- With the broken tap removed progress continues on the SAIM. Parker almost has the upper gantry done.
- The SSPS front panel test is is scheduled to be built next week. Should have an update on the front panel next podcast.
- Parker is going to make a REV 2 of the MacroWatch. Going to change the PIC16 to a Silicon Labs Sleepy Bee.
- Stephen is learning more about programming the Parallax Propeller. Gotta flush those buffers.
- Parker is going to add a GPS module and a cell module to his Prop Fan project.
- Stephen made a mistake on a large board layout and had to drill out some VIAs.
- Parker goes on memory lane on learning how to draft and draw in CAD. Stephen talks about Patent Drawings. Patent Drawings have a standard.
- Stephen has been sick with a stomach bug so he wasn’t able to get much done this week, but he did get some new transformers (See Figure 1). Parker shows how to get gains by lifting them.
- Stephen’s transformers where designed by the sloclones forums. They are the kitchen sink of audio transformers.
- The Space Echo RE-201 is getting an over haul. Will be getting recapped this weekend. New front plate and a new wearable kit that replaces all the parts that wear out.
- Dustin and Stephen are working on a python script to control a programming and test fixture for a customer. Computer does everything automatically.
- Stephen brags about his latest dance move: Adjusting the Scope (See Figure 2).
- People are making really awesome modified gameboys using Raspberry Pi Zeros. Will be a great project to build an all in one emulation board using the Octavo OSD3358.
- The FAA can detect drones/Quadcoptor with an AUDS (Anti UAV Defense System). Can also jam the radio signal.
- Stephen asks Parker a Boat and Rock “interview” question.
Special thanks to whixr over at Tymkrs for the intro and outro theme!
About The Hosts
Parker Dillmann is MacroFab's Co-Founder, and Lead ECE with backgrounds in Embedded System Design, and Digital Signal Processing. He got his start in 2005 by hacking Nintendo consoles into portable gaming units. He also runs the blog, longhornengineer.com, where he posts his personal projects, technical guides, and appnotes about board layout design and components. Parker graduated with a BS in Electrical and Computer Engineering from the University of Texas.
Stephen Kraig began his electronics career by building musical oriented circuits in 2003. Stephen is an avid guitar player and, in his down time, manufactures audio electronics including guitar amplifiers, pedals, and pro audio gear. Stephen graduated with a BS in Electrical Engineering from Texas A&M University.
Host 1 00:09
Hello, and welcome to the macro fab engineering podcast. We are your host, Parker Dohmen. And Steven Gregg. And that was really good. So hopefully we get past this point where we say we did really good intros. We're almost to Episode 20. This is episode 19. So I think after 20 We'll stop doing that unless we mess up. It takes 20 episodes to get the intro. Right. Get the intro, right. Yep. Okay, um, this more progress on the same machine. Cool. I managed to get that tap out. I ended up broke last week. Yeah, it was actually really funny cuz I got a left hand bit. Yeah, to get it out. broke that. And so I just got a regular right hand. I think it was like a Oh, what was it a? It was larger than eighth inch bit. I can't remember the exact size. And I put that Chuck that up into the drill press. Yeah. And it was it was smaller than the left, the left hand bit was a 4.2 millimeter bit, which is the size for all the metric sizes. Well, it's a metric tap into M five tap. So 4.2 millimeters is the tap size for that. Sure. So I got an SAE bits. All I had just poured through. It's like I actually cord through the tap, and then re tap the whole thing through that tab. Probably still somewhere in there up in there. But I was able to get the M five. It's all cleaned thread. Now that looks good. Well, just as a reminder, this was a two dash 56 a hole right or tap? No, no, no, that's that was the that's the Jigga destiny. Oh, this was a different this is the same machine. That Yes. I broke 123 I broken five taps and equivalents of like $80 for the taps. Like one week. It's brutal. It's actually really funny is once I got on the Jigga destiny. Yeah, I broke a tap on over the weekend, which is the last tap I had. And I ordered three taps. I got through all the hole. I did not bring a single tap after that. So I have I have three 256 taps now. One of those Murphy's Law thing Oh, of course. Yeah, of course. It would either be that or you would break all of them on the last hole. Yeah, I almost almost did that. Yeah, cuz I was tapping the last hole. But I dropped my tap handle after I'm threaded it. But it landed. Um, it landed the handle side down and save the tap. Nice. So we're using oil with it. Yeah, I was using. I wasn't using tap oil. I was using just three in one cutting oil, whatever. Yeah. Three and one was electric motor oils, what they call it? Yeah. It's nothing how it works. It works. Yeah. I'm moving tapping. Yeah, I'm hand tapping. So it's not like a machine tapping. You have to have that specific shear force the tap fluid. But yeah. So I'm going to work on the upper gantry probably start early next week. Cool. Cutting it. I have a we have a a cut saw at work to cut that up. actually has a wood blade, but does cut extrusion really well. And then the SSPs front panel design should be built next week. And so hopefully by the next podcast episode 20 We I will have an update whether or not it works or not awesome. And if I am hoping by next next Monday, so two, Monday's from now is start routing the actual front panel to complete thing. The big thing big guy cool. And that's probably gonna be four layers. That's gonna be a big board. Yeah, just to make it's going to be I probably make it like a 2.8 millimeter thick PCB just has rigidity across the whole board. Because why not? We're already spending a lot of money on this thing. Yeah, this thing is ridiculous. Yeah. And the funny thing is, I want to build one of these super stupid power supply for myself at home. Yeah, I think the awesome power supply. Oh, it'd be killer. My favorite feature that we're building into this thing? Is that can do power supply noise simulation. Yeah. You don't see that? i You don't this is like only the high end power supplies can do that. Yeah. And yet the program admin. So I want to be able to have like, you can select Gaussian noise and you can select like a peak the peak level Yeah. And then it will make Gaussian noise at this ripple voltage. And you know, shove that through. Yeah, even to put white or pink noise on top I was actually um, what is the max frequency we can run through those OPA op amps?
Host 1 05:08
Oh shoot. It's probably was they can drive speaker so it's got to be
Host 1 05:14
Killer we can get we can we can go up to 20k Easy. It's probably less dependent upon the the OPA op amps it's probably more dependent upon the rest of my circuitry that is limiting the frequency response. Okay, I guess we need to figure that out. I you know, I think I put a specification of 50 kilo hertz. Okay, do you think it's gonna be enough to simulate like, Yeah, that should be enough to see me like automotive noise and stuff. I guess what we should do is just take this oscilloscope and capture some noise off my jeep. Well, another thing? Yeah, let me let me look at it again, because I don't know what the roll off is. Up at the high end, it's probably only a single pole roll off. So yeah, we need to look at it again, I don't remember off the top my head, they don't be a cool feature, because we want to have an input on it. So you can send a signal in, and then it will amplify that signal out. It would be cool if we could record that signal even for low, like just a small chunk. So you can repeat that signal to Looper as a loop. Yeah, that would be cool. Because then you could pipe in, like, motor noise. Yeah. And just capture that. And then have real world have real world noise overlaid your power. Oh, that's kind of cool. Yeah, that'd be cool. Now really cool. I think we got to figure out how much power or how much power we can actually put into that input. I'm thinking at least like 24 volts. Or you can capture Yeah, no record a 24 volt signal.
Host 3 06:48
Yeah, yeah, we could absolutely do that. And in fact, that brings up a pretty cool idea that I hadn't thought of before. So we have we have the digital that sending commands over to my board, which spits up analog to the op amps, we could have an input that is purely analog that bypasses all the digital, it gets mixed in later on. If you want to dump in an analog signal, post all the digital stuff. Oh, you could dump in all your digital and mix. I mean, sorry, dump in all your analog and mix it with your digital later in the signal chain. Kind of like an effects loop. Yeah. Power supply. That's good. Yeah. Yeah, that could be it's really easy to implement.
Host 1 07:27
Yeah, we should do that. Yeah, I like that. Cool. And this see? Oh, yeah, we were talking about the jig destiny. So the jig destiny. We've been testing this week, it works really well. Except this new version doesn't fit in a reflow. Oven. Oh, why not? Parker. So the reflow oven is supposed to be SPECT at 18 inches wide. Yeah. The conveyor. I can only get it open 17 and a half. And so my jig is like a quarter inch, it's seven and three quarters inch wide. Can't you just put it in kind of cockeyed doesn't work. So basically, I need to call it off about I can call it a quarter inch and make it barely fit. I'm probably gonna make it a half inch shorter on the width. Just so I have a little bit of wiggle room. It's kind of annoying. The good thing is it does work through all the other machines, the my 500 and my 200 works great. Yeah. We got to change some of the usability aspect of sliding the the standoffs around. But it works really well. Our operations teams really like it. They're pretty happy with it. So well. Probably next week is next week, I'll design the rev three and get shipped out for 4 million out. Cool. Yeah. And then. Let's see. Oh, yeah. And then also gonna be working on the macro watch. Rev two. Yep. Because we're running out of macro watches. So if you if you order $1,000 Order at macro fab. Yeah, you get a macro watch for free. And what's a macro watch? Macro watch is a very low cost. Binary watch. I designed off a pic 16 I think it's a 16. Yeah, we got a huge article on a website about it. But the cool thing is, we designed it and built it. And like basically mass produced it in like two weeks, including design really fast. Yeah. We didn't do a prototype and we built like 100 of them off the bat. And it worked. And we gave them away at at the Maker Faire. Yeah. Last year. Yeah. It was a pretty cool little project. People love them. Yeah, people love them. Some of them were kind of rough to the rev two. I'm gonna change the processor to Silicon Labs sleepy B. I've never used one. So it's gonna be kind of interesting. I'm gonna have to port all my pic code over it should be pretty easy. It should be basically dry. Drag Drop the the pick code. Yeah, say that now. We'll see. We'll see how you say that next week. In who knows? It might be really, really Yeah, I import prop code, see all the time spin code to see. Yeah. And that's not that hard. Mainly because I write my prop code like see, they do have C on Prop now. Really? Yeah, you can get GCC on the on the pop. It's pretty cool. I've never tried it. I like spin too much. Well, now that I'm playing around with Prop, I might want to mess around with it. Because I love randomness. Yeah. How are you finding the prop so far? So far? It's okay. So I've dealt with AVR. I've dealt with pics I've played around with with a handful of other stuff. So far. Prop has been one of the easiest to learn. Yep, one of the easiest to just, if I wanted to do something, just here it is. And I like that it's really fast. And it's really simple. And the best thing is you have an expert sitting right next to you. Yeah. The issue y'all had today? Well, okay, so as most of you guys know, I'm mainly an analog guy, not a digital guy. So I'm sitting there beating my head over code for half a day. And then Parker looks over. And he's like, Oh, you're missing this one command. We're just like, Damn, man, who wasn't here wasn't flushing his. I wasn't flushing my serial buffer. Yeah. I should have known that. Yeah, you gotta flush when you're done. So to beat my head over this when you're parsing the string? Yeah, you were, you're looking for your person to string for five characters. But you only want needed one. I was working part of the time part of the time part of the time, but because I was filling up my buffer and doing all kinds of weird crap. Yeah, yeah. So Parker sent me straight. Well, this is what happens when the analog guy tried to press the proper this way. I've ran into those same issues. Yeah. And that's why I knew exactly what was wrong. Well, it's funny, because I'm sitting there the whole day. And I'm just like, I know, Parker's just gonna look over and be like, here's the answer.
Host 1 12:10
We wanted to figure it out myself. And then the prop fan, my jeep. The I posted some pictures on Twitter and stuff, everything works really well. And then I came with the idea. I should put GPS in the cell module on this. So I'm working on that now, too. Because why not? Yeah, why not? Out of fruits got a really good GPS module that you can buy for like 25 bucks. It's like I dropped that on there. I'm actually gonna put them on the bottom side of the board. And so I don't have to make the board bigger. Because the bottom side the board has nothing. Yeah, I'm gonna put two ginormous heavy parts. Awesome. I'm probably gonna have to hold them down with epoxy. I'm gonna have to change your layout pretty heavily. Now. Now. There's, it's almost universally ground plane on that bottom. Okay, that's so I'm gonna have to change much. But I'm hoping you don't need to actually go mean, you talk to them over serial terminal. So you only need two lines from the prop on the parallax prop to it. per per device. Yeah. So I've got like 12 io lines leftover, you know? Yeah, it's easy. Oh,
Host 3 13:26
Hey, speaking of ground planes. I just just a mistake I made this week that is worth checking. It depends on your EDA tool. may use your trace. By the way, I do use dip trace. And recently I've been using a beta version of DTrace that I probably shouldn't have been using. But make sure you update your ground planes. If you make any changes to your board. I made a mistake. I didn't update one of my ground planes and I shorted one of my power planes to my ground planes through a via because I didn't update my plane. Yeah, the best thing is he's got this. I think it was on Tuesday. Yeah. And Tuesday. He had this I looked over and and Steven was over at the drill press with this like $350 PCB, and he's just drilling. Like I fucked up. I only had to drill out like, four, maybe five. It works now update your ground planes before you order your pizza. phonies, Eagle. Does that automatically for you? Yes, you're on planes. Yeah. Dimitri should. Yeah, I should. It should. I, Parker and I continually have this rift between us about the whole ego versus dip trace thing. I will totally completely concede that eagle is probably better than dip trace. But it just annoys me that I don't so much that I don't want to use it. Even though I know it's better. I don't want to use
Host 1 14:59
It. It just depends. They both have they do things completely different how you draw stuff. Yeah. Yeah. I like I like Eagle just from it's a it's the UI, and how you draw stuff is really old school CAD. And that's why I don't like why you don't like it. But I liked because I learned old school CAD back in high school, right. And so whenever I go and find like, like, my favorite 2d drawing program now is draft site, because it's like old school CAD, yeah. And actually tweeted that, and DraftSight was like, Thanks for liking our product. And I was like, I'm like, Oh, this is awesome. It's like old school, CAD, old school CAD, where the left mouse button doesn't do anything. You type out half your commands. Exactly. Oh, my gosh, um, and I actually started picking up Autodesk one to 3d Again, that's really cool. It seems to be like a much better version of SketchUp. It's the same kind of thing as SketchUp is, you draw these how I draw 3d stuff is I draw a 2d thing, and extrude that yet, that's how you should Um, well, there's different ways to do it. That's how I do it. I went when I went through. I was, I started school as an aerospace engineer. And I can't remember the reason why but but we went through a whole entire lecture on why that's how you should start a drawing. I don't remember the answers. I'll have to look up why. I think it's an engineering it's a lot easier to to get a dimension thing Correct. A dimension object, correct. If you draw that face 2d first, and then pull it and then pull it out? Yeah. So that way, you know, at least two accesses are 100%, correct? Yes. That's probably why Yeah, that's it's most likely something easier to manipulate down the road, if you've done that, and you create a part out of that, or whatever you call it, because, um, when I learned Autodesk in Autodesk 2000. In high school, we would actually refer start drawing on job paper and stuff. So I actually can draft with a drafting table. Yep. And all the the I actually have all my stuff like, like templates for drawing circles and stuff. Oh, yeah. And the templates for all the numbers and letters. But then we went over the August 2000, and started drawing simple stuff. And eventually we the I took four years of it. Every single year, I was in high school I took took drafting, yeah. And then in your fourth year, my professor, not my teacher, I guess. His name is Mr. Parrots. I don't know if he still is with spring branch ISD. But he actually hadn't like kind of make up the curriculum for the fourth, fourth year. Cool, cuz there's only like two of us. And he's like, the first time he's ever had students do like, four years, four years of doing 3d design 3d drawings. Yeah. In a 2d space. Hmm. So in August 2000, which was all 2d, you had to do isometric drawings. Oh, yeah. Those were fun. But yeah, and, dude, I can put that up by just typing in commands. Nice. Yeah. That's like, the only thing I can do in command line is draw stuff. You know what? Okay, this just popped into my mind. We know engineering drafting. There's another type of drafting that engineers work with and deal with that. I don't know. Is there a school that that works for? Have you seen the drawings that are in patents drawn? All look like they came from about 1850? Yeah, they still look like there's got to be a school out there that maybe one per line drawings like that. Maybe just one person one person in the entire world that does every patent, they still look like an old like boiler design. There's gonna be right there it does that. We need to look up the knowing of what kind of art that is. Yeah, cuz it's definitely different. Oh, yeah. Yeah. And it's trained because they all look alike. And like when it says like, figure one, it's like, set well, I can't remember what that font is called. But it's got like the Joshy. No. Is it a serif? Serif font? The font families? Yeah, yeah. It's it's it's like a proper for. It's a proper
Host 1 19:28
Font, but it's draw handdrawn? Yeah, I don't know. stencilled at least. Yeah. Well, and it's patents currently. Yeah, right. Right. It's almost holographic. Yeah. It's a good way to put it. It's, it's something and it's funny because like when we as engineers, when we draw, make a drawing and we have to point to something, we do a straight line and then an angle with an arrow. If you look at a patent drawing It's like a squiggly. Yeah, it's a real nice like calligraphy arrow. It like does a slight bend to the right and a slight bend to the left. But there's got to be rules to that. Yeah, yeah, we need to look that up. How to Draw patent drawings. I bet you that's a Google thing.
Host 1 20:14
I bet you it is. Yeah, Google probably does all the patents. Alright, so what are you been doing this week? This week's been kind of rough for me. I know nothing
Host 1 20:25
Is on my show notes as Steven toilet. I got a really bad stomach bug earlier this week. So I've been making a lot of sacrifices to the Porcelain God. It's
Host 3 20:39
It's, it's been pretty rough. So yeah, the beginning of this week was was kind of not not too productive from my side. But earlier this week, I did actually get some new Transformers and yeah, um, my favorite was lifting those up, like curl curling weights. So yeah. So as as any good engineer, I always have like, 1500 projects in the mix. And I'm always trying to juggle, which one I should work on at anytime. And it just so worked out that my wife is uptown for a couple weeks. And so I was like, Oh, I gotta work on a new guitar amp that I'm gonna trade that volume on. Yeah, so I bought some new Transformers. And this is for like a monster. 100 Watt, beastly amp. And so I finally got the Transformers in for like a
Host 1 21:29
50 pound box. Yes. Three parts in it. They're huge. I love it. We need to post some pictures of them. Yeah, there are their absolute mercy is, is most of that weight is two parts. The other one's a little tiny choke that like, it's a three Henry truck, which isn't anything that you know, bat your eyes at. It's a it's a it's a big industry. It's a big doctor, but it doesn't weigh that much. It's the other two ginormous transfer. Yeah.
Host 3 21:57
I mean, if you have the the output transformer has the the primaries on it has an inductance of like, 100. Henry's, you know, they're monsters and learn handbuilt. Right. They say handbill company, classic tone, classic tone, and em. Yeah, TM, they have that all over the over, they make a whole bunch of different guitar amp transformers. But they make to in particular, that there's a forum that I deal with that they what's what's the forum, the forum is called Slow clone slo clone forums. And they they make clones of a traditional amp that was built in 1985, called the Soldano slo 100. And this forum has grown into probably the largest high gain metal amp forum out there. And it's not just metal amps anymore, it's pretty much anything. And these guys helped. They worked with classic tone to get a what's called a project transformer built. So this is a monster project, power transformer and a monster project output transformer that basically it's the kitchen sink, it has everything you want. It has every tap that you could possibly want. You want, whatever, it's in this transformer. It's not cheap. It's not light. It's not small. But it's got everything.
Host 1 23:18
They've got everything. Yeah. Do you know what the efficiency of that? Transformers? Oh, mean, transformers are actually usually pretty efficient. I don't know if there's any difference, or because that's so many windings of different coils in
Host 3 23:32
It. Oh, I mean, that. I mean, the reality of the of the thing is I'm putting it into a circuit that at best is about 65%. So it's swamped out by the crappiness of the circuit. Yeah. So because you're using so Okay, so it dropped from 65 to 64%. Whoo. Yeah. And then we've been working on the space echo, right. Yeah. Space echo getting getting some new parts for it. The space echo is a rackmount piece of gear that Josh has here at the shop that we are doing a bit of a restore job of restores a little understatement. Yeah. So it had some some lovely overall, did a bit of overhaul. It had these wonderful the device was not rackmount and initially, it was converted to rack mount using some aluminum plates. Yeah, aluminum plates and
Host 1 24:27
Screws found at Home Depot. Yeah, that don't match. No match. Not by Josh Josh. Josh didn't do this. So So we designed him up a fancy new white front plate that actually arrives on Monday. Yeah, yes. And is black and it's gonna look slick. It's gonna be it's gonna be sick. You know, I'm not gonna spoil it. There's some. There's some cool aspects about the front plate that Mark Parker did that I'm like, oh, yeah, thumbs up. Yeah, that's his job. I'm gonna wait to each present Josh. So you can see the front plate in all its glory
Host 3 24:57
In the glory. Yes. And then we also purchased a what's called a wearables kit. So brand new set of tape. New felt pieces. There's a new I think they call it an upgrade bearing. Yeah. The wheel yeah basis the wheel that moves the tape through. Yeah, it's made of of inmates made of a different material that is they say it produces less. What's the word they say? It's like whoosh in the sound or something like that. I don't remember what it was. It was some kind of be
Host 1 25:27
What is the whoosh is what you want? Well, then we're taking it all out. My favorite was so we're looking at these rebuild kits and there's like, four or five different companies that make them yeah, have some and they're all like exactly the same. But some are like $70 and some are like 150 they're all exactly the same though. Yeah. The cheapest ones can take a whoosh yeah the old thing the Blue Shop but my favorite was does your role in space echo motor have excessive Wow. And flutter? I'm like, excessive Wow. Much flutter. Very spacey here. He's basically throwing a dog meme. Oh, dog. Yeah, space echo dog. So yeah, when that arrives Yeah, we'll be Australia. Yeah, that's right. No, but as it has excessive round flutter. Okay, so the following flutter won't anymore though. The web the web would have flutter I know but I don't know what Whoo. She is. I do not know what we could talk about. Wow. And flutter another time. And we're recapping it this weekend? Yep. With fine gold with fine gold caps which we talked about last week. And the Yukon fine gold and go I'm actually I would whenever we say find gold I picture like a back in the gold rush in California. And like when those like guys that's got like a crick in his back the messed up hat. And like missing all his teeth and he opens his teeth and is a capacitor. A fine gold capacitor is the only tooth Yes. Or, or they're all out there in the river. And they're panning and they sifted around. There's just a bunch of cash. You know, that should go on our list of videos to make back. Thanks. So yeah, aiming for audio cat I think for diners patching might be the title of this podcast. Okay, there we go. Done. Done. That's actually a by the way, that is the hardest thing is coming up with a decent name for the podcast. Maybe there should be a goal, we should think of the name? Well, I would usually I do. We usually I'll take a snippet from it. And make out the title. Okay. Something stupid that we usually say. But that that that is pretty good. Painting for caps. See, we actually already talked about the next thing we're going to talk about. Yeah, a little bit. The so the customer fixture test thingy. Yeah, I've been working on that. I mean, we've been talking about that on the podcast for past couple weeks. Yeah, it's almost it's, it's, it's right on the edge of being done. Yeah. I think by tomorrow, y'all should have all the essay y'all because it's Steven and Dustin, who we've had on the show before he was on episode 13.
Host 3 28:35
Yes, Episode 13. Yeah. Dustin, is one of our line engineers. He is pretty good with Python, Python scripting, something that I am not good at. So he and I've been teaming up to work on one of the jigs I've been dealing with a customer and we finally got pretty much all the functionality what we need to work in well today, which was which was fantastic. Yeah. Awesome. It's awesome. Yeah. So we're able to put a panel of boards down, open up programming lines, talk to a specific board, then control that board to it, talked to a motor and then get feedback from the motor and see that it's spinning and move on to the next board and go down the line. So I'm just I'm happy because it's finally doing what it's supposed to
Host 1 29:22
Do. We should see if we can do that same thing with the pin tech board, because we have a test fixture for it. But right now, you have to have two programs open yet to have the picket three programmer open. Yep. Actually, no, it's the MP lab. IP is what we use. Now we stop using that old piece of software. So yeah, we just the MP E. Oh no, the MP lab. IP inter programming environments. Yep. And then we use a serial terminal to talk to the board. And basically you start the programming and then the serial terminal will tell you hey, go to IP e program, come back when it's done. And to be really cool if we can just automate that whole process python script? Well, I have to the good thing is I know when FA, FA II over at microchip, I can see, hey, is there a command line option we can make work with the picket? I, you know, I wouldn't be surprised if it's got it's got to happen. They probably have a command line, yeah, way version that we can, or a different programmer that works with that interface. You know, what's really cool that we found out today, so so we have our Python script going. And what it does is it basically when it comes time to program, we're programming an STM chip. Yes. So what happens is, our Python script will open the STM command line interface, and program the boards what I thought was going to happen was it would actually physically open up the the command line interface in a separate window. It doesn't, it actually dumps everything to the actual Python window itself. So everything is sequential. And you can see history of everything that happened in the Python, you know, what, Id Dustin's using? I was Python. 2.7 I don't remember what the ID Yeah, cuz I've never seen that interface before. It was it was clean. I liked it. Yeah. So we're asked Ross lesson, and we'll post it in the in the description. Yeah. Because, yeah. Worked out. Well. Yeah. Um, we did a double, double high five. That's all three engineers. High five. That could be a dance move. We need we need to we need to show my news dance move. Yeah. It made it up a couple of weeks ago. Yep. Oh, we know. It's called Justin. Just in the scope. I think I think because we mentioned that we have to have a GIF of you doing it. Well, wait. Well, I mean, I'm, that's why I'm bringing it up. Because we haven't done it yet. We need to so we'll make a GIF of you doing it for the for the podcast description. Adjusting the scope. You know, that's actually probably going to be the picture. Abel, who's our marketing guy? He's probably going to use that picture of you adjusting the scope for the podcast. I'm totally cool with the one you did. Oh, man, I the fact that you when you bust that move out, immediately lost it. I had that one in my back pocket for a while buddy. Oh, man. Okay. RFO section RF, this is only slightly RFO there's only going to be I think only like one, maybe two opinions in this thing. Okay. Okay, so the first thing is, there's this really cool project that's on Hackaday Yeah, I was on Hackaday or Kotaku, I can't remember anyways. Back in the day, about a decade ago, Burger King came out with these like fake Gameboy colors that were actually like analog toys, like press buttons and like, things happen on the screen. I don't know. Remember what it was. Anyway, someone hacked one apart, put the guts put a Raspberry Pi Zero in it, and a screen and made it a Gameboy emulator. Okay, it's pretty cool. And there was an I started searching more into that and there's another person who took a old Gameboy dmg oh one which is the big old school game board gray. Guy the big red brick we call the Gameboy brick. Yeah, yeah, yeah. He did pretty much the same thing. A hack that apart, put a a a Raspberry Pi Zero and screen under that. I'm like, Okay, if y'all don't know, I actually got my start in doing electronics hacking apart old video game consoles and making them portable. Yeah. So this is like it's right down here. tugging my heartstrings seeing this kind of stuff. And sometimes thinking I'm like, How can we want up these guys? To love one up in people? You got to one up the Justin noscope dance. Oh, yeah. Yeah. I'll come up with one that will. Okay. So how do we want up these guys? So octavos chip? Yeah, they build a one board solution portable emulator system. That's just a beefcake. It's got one gigahertz processor. 512 Mega RAM. And we just, yeah, we can we can probably emulate ps1 on it. Yeah, probably. We'd have to have analog sticks on it. But besides the point,
Host 1 34:42
Something that's got that much horsepower on the hood, and we can fit it into a DMG zero size case. A dmg 01 Sam's case. Yeah. Yeah, that'd be awesome. That would be killer. Making lithium battery powered. And we want to aim for a project. Yeah. And make it a Like a put like a four inch screen so you actually see something. High Def, and I think we'll put rechargeable batteries, I'll probably use 18 650 cells. Yeah, but make it so you can replace them as well. So you can charge them in unit or out of the unit. Ah, so if you're on the go, you can just pop out pop new 18 650s in. And you got a you got a one gigahertz Linux emulator and your pocket in your pocket. We already have that sculpt phones, but this has controls built in. And we were talking about the amplifier we want to use for it. Yeah. So you're doing the you want to do the analog end? Yep. Because we want to seem to be like birnberg just overly power. Yeah. So you've got this little boombox thing? That actually sounds really good. Yeah, I
Host 3 35:50
Bought my wife a Bluetooth, just I don't know, portable speaker thing. And it's, I don't know, maybe six inches, like find you by maybe half an inch, something like that. Yeah. And it's got some mean sound coming. It sounds good. Yeah. So I'm thinking about cracking it open. Taking a look at what they did what
Host 1 36:10
Speakers they have in it. It's got a weird bass diaphragm in it, which I don't think we can copy. But might not need to, we might not need to. So I actually watched this i I held the diaphragm, the bass so it couldn't vibrate. And I couldn't actually tell a difference in the sound. It may be also what we're playing at the moment. Which is pretty crazy. We're listening to random access memory today. God I love that album. One more time. That's exactly how it's perfect. Ah. Okay, so, Matt, really opinion. That's just the project. I promised last time that we'd have a project for Octavius chip. Yeah, that's gonna be it? Well, my opinion is it's really cool. Yeah. So I want to figure out how to do the screen. Okay, um, I have we have a couple of screen four inch screens that we can drive composite right now, right. But I like to be able to drive it natively from the chip. So I'm actually going to email Greg and be like, Hey, Greg, what's gonna be the best way to get video out? Can we drive? Do you all have a recommend screen that we can drive directly? Like LVTs from the chip? Oh, man, or can we or do we have to go HDMI? Or can we do composites? We already had the screen. I bet you're going to have to have some something in between? I'm hoping not. We'll see what he says. Yeah. It's my gut feeling. And he says right down the street. He might want one of these. He might want one. I think it'd be pretty cool. And we're gonna 3d print the cases. And we sweet Heck yeah. Alright, so I at least I thought this article was cool. The FFA FA, which does all the planes flying around and stuff in the States. Mm hmm. They don't like drones, or quad copters too much. Because basically, because a lot any pretty much anyone can fly them. And no one pays attention to the rules. Right? Where you should fly RC vehicles and not. And so they're setting up these things called ah, odds, odds. Whatever. Anti UAV defense systems, a UDS, a UDS odds rolls off your tongue. Yeah, apparently you can detect a drone up to 10 kilometers away, which is, what, five miles? Four or five miles? Yeah. Maybe a little bit more US USA folks. And they can track it with vision and infrared. Okay, in fact, they can pick up something like a foot in diameter that far away is that's pretty impressive. Yeah. But the interesting thing is they can jam it. They can jam the pilot signals, really? So it's jamming 2.4 gigahertz at that distance. That's a ton of energy. That's beefy. Yeah there cuz that because you got thing is the person who's on the ground got at least you know, I can't remember what the legal requirement for how much wattage for transmitter receivers, let's say a watt. But you're only like a couple 100 feet away from it. This thing is five miles away. And they can jam override your signal. Yeah, that's, that's frying your brain. Kind of. Yes. You're right next to it. Right. But uh, but yeah, so you can jam from that far away. Wow. I mean, most high end drones nowadays. When they get Jameel they lose signals to the base. They automatically fly home. Yeah. So I guess for pilots, it's not too big of a deal for him to be jammed in the first place. That pilot should never been in that area to fly because they're usually probably next to an airport. Yeah. There's some talk about this online where like, oh, the FAA is like overstepping the boundaries. Like, no, they're just making sure you don't like, ram your, your quadcopter into a passenger jet engine? Yeah, yeah. A $1 billion. Yeah. I personally, these things are very expensive, which is probably the only thing I have against them doing it because we have to pay for them as taxpayers. Yeah. But maybe people should not be stupid and fly their drones onto airports. That's my opinion. That's we're flying stuff goes. That's where fun goes. That's my opinion about it. Hmm. I don't know. It's really, I mean, I tend to I tend to sit in the same camp as he on that one. Yeah. I mean, if you're dumb enough to fly a drone at an airport. I mean, they, if there's one place where they keep their eyes on the sky, it's an airport. You know, like, that's probably a place you shouldn't, if you've got a drone, fly it in your neighborhood or go down to your park and
Host 1 41:05
Have a license for it now, but you can apply for online and get it online. Okay, license for what? Flying a quadcopter over a certain weight or size. Okay. Yeah. And that makes sense. It makes sense. That makes Yeah, I mean, it's probably a pretty big size and a pretty heavy weight. I think it's, yeah, Josh. I can I know Josh has a quad. And I know you low. Yeah. Less than five pounds. Yeah. Okay. So basically anything that's got a camera on it, you have to get a license. I know getting licensed is easy. It's an online thing. So well, okay, just put it this way. If you can buy it at Walmart, you probably shouldn't have to have a license to operate. Like something that you fly around your house or read around. All you have to do
Host 1 41:57
Is basically weaponize it and fly it on the air. I'm sorry, Josh. I can't I can't do that. I I cannot promise that you
Host 1 42:07
Do you? Yeah. Oh, well, you not fly this near airports where you're not put a gun on it? Well, you're not
Host 1 42:19
Well, you're not pick up little What do you not pick up little cats and fly them around? America should be able to do what I want. Ah, that's, that's awesome. Well, I don't know if you can buy a big quadcopter. What do you do you get a cool, like, Do you can you put it on your driver's license? You know, you got your driver's license. You have you have like, you can operate a car a mind says I can operate a motorcycle. Can I have quadcopter on a queue on the back? Well, would it be? You have to go to the D and the Hammond D is there. I know mine's a Class C because I just have regular class C is his car, right? Yeah. Class C is normal. Normal color cars. Yeah. See mine says cm because I'm car and motorcycle. What's commercial? A and B, isn't it? Yeah. ABC and then M for motorcycle? Yes. They did D for drones. Diva drones and Q for quadcopters? Well, drone quadcopter it's the same from the media. Well, but but but drones can have weapons. Yes. Tender mint quad never weapon. Well, not if not if you have a license quadcopter. When you say drone, it has some drone as autonomous. Autonomous? Yeah. Whereas most quad copters the only autonomous that has is you can press a button, it can fly back to you. Yeah, I guess that kind of makes it a drone. That's, that's a little bit kind of droney. Yeah. I don't have anything else to add to this. I only have a little tiny quadcopter. It's like, I'm one of those Hubsan little tiny guys that fly around the shop have a license for it. You got to get a license for oh, it's like less than a pound. It's like it weighs less than a full can of beer. Is that your unit of measure? Yeah. 12 ounces, two ounces of beer.
Host 3 44:15
Awesome. Yeah. I'm done with that. That's great. All right. So you have a question for me. I guess I have a I have a question for you. And I I swear I've asked you this question before. I don't remember. But I do remember when you asked me, maybe you will. Okay. So in a previous life, I worked at a place where our engineering manager was adamant about asking every new engineer who came in doesn't matter what their discipline was. He asked them one question. And he asked them in the interview, and he asked me in this in the interview, and all of my friends who worked there too. Oh, boy. Okay, these and this was the last thing that they asked in the interview.
Host 1 44:57
Okay, so you're in a boat. Okay. In a pond, okay, you want to rock are in this boat. So me in a rock and a boat in a pond in a pond, okay, you pick up the rock, okay? And you throw it into the pond. Okay? What happens to the water level? Does it go up? Does it go down? Or does it stay the same as Sam? Does it
Host 1 45:24
Should say the same displacements displacement. But if it's in a boat, is it due to displacement?
Host 1 45:30
Yeah, when you're in a boat, a boat weighs more. And so it displaces more water the same weight of the rock. Oh, the density of the rock? It does it does depend on density. It depends on the density of the rock. Yeah. So it totally does depend on the density of the rock. So when the rock is underwater, it actually depends on the volume. So the roster mean, rock is usually more dense than water. Yes. So if the the water level would go down,
Host 1 46:04
Correct? Correct. That figured it out. And it brings in water which That's correct. Yeah. And that's porosity. porosity. porosity. Yeah, that's the word. Yeah.
Host 1 46:20
So So when someone asked you that question, and your interviewer asked, Is it a lava rock? Actually, and that's just that's that's the thing. They didn't fall on my face on that one? Well, the first question, the first thing you said was that say the same? Yeah.
Host 3 46:39
I was thinking just displace. Right, exactly. But But the whole point that he kept telling me over years and years of me sitting in on these interviews with him, was that he was just looking for an engineer to do exactly what you just did was to just walk through it in their mind. You know, what, like, he doesn't really care if you get the right answer or the wrong answer. Did you kind of like put pieces together? No. And so I can't believe I hadn't asked you
Host 1 47:03
That question before. No, I like that question. It's a good one. I like that one. Yeah, it actually does make you get her first thing is, it says the same because this placement? Yes. For me, because that was the first thing I was like, okay. You know, wait is wait. And like, oh, wait, yeah, this depends on the density of the rock because it weighs Yeah, right. Right. But if but if you consider the density of rock, in general is going to be much more than water. Yep. Then the water level goes down. I guess you can ask the Ask the person or at an interview is does the rock float? Is the rock of which? Well, and actually those kind of questions. I'm surprised to pick up on that you're still good
Host 1 47:46
Lover from Monty Python? Yeah, right. Does the rock burn? Sorry about the drums. Man. It's all good. Well, cool. Cool. I'm glad I'm glad you got that. JUSTIN That question tomorrow. Oh, man.
Host 1 48:04
He'd like I don't know, man. I don't know, man. I don't know, man. Let's go program something. Yes. Go program to program this, Jake. Okay, cool. And I think that's gonna wrap it up for this episode, right? Yeah, I think that's good. That was episode 19. Yep. Next week is episode 20. Whoo. Yeah, I can't believe we've been doing this for this long, especially week after week after week. It's nonstop and yeah, so that's gonna wrap up this episode of the macro fab engineering podcasts. We were your guests up guests. Oh, I missed. Oh. Oh, we were your hosts, Parker Dolman. And Steven Craig chatroom next time guys. Take it easy. There we go. We got that. We got down. We'll get we'll get it right next week. Yep, next week.
Transcribed by https://otter.ai