MEP EP#62: Yo Ho Ho and a Technological Bottle of Rum

Parker Dillmann |   |  1473149-4, another Brick in the IoT, Capcom, CSP-2, Design Challenge, DS90C365A, LVDS, MacroFab, macrofab engineering podcast, Meetup, MEP, NTAG213, NXP, Podcast, Raspberry Pi, RPI3

MacroFab Engineering Podcast


Download: MP3
RSS Feed: Link
Twitter: @MacroFab

Runtime: (40:45)

Parker Dillmann
Stephen Kraig


Figure 1: RPI3 CM Board Parker is working on.
Figure 1: RPI3 CM Board Parker is working on.

Podcast Notes

  • If you enjoy listening to MEP, please let others know about us! Tell a coworker, loved one, friend, or share it on “social media”.  We might reward your love for us by sending you a free koozie! Tell others how much you love us, then send us an email to with the codeword that we’ll mention during the show, plus your mailing address. Each show has a different codeword, so keep an ear out!
  • MacroFab and Mouser Electronics have teamed up to create a free monthly meetup in Houston (April 26th) for anyone involved with hardware & electronics engineering or manufacturing. Hosted on the last Wednesday of every month, these meetups are designed to build a community of professionals who want to learn from one another, gain new insights on emerging electronics technologies, and expand their network.
    • Sign up here!
    • What to expect
      •  Networking
      • Fireside chats with Q&A
      • Individual project sharing and discussion
      • Door prizes
      • Refreshments
  • Parker has been working on the next step of the RPI3 LVDS project.
    • Pinout the SODIMM connector for the RPI3 Compute Module. See Figure 1.
      • Part number 1473149-4 by TE Connectivity
      • LVDS DS90C365A IC is net listed up
      • Trying to use the PWM function to control the backlight of the LCD.
        • GPIO40 is PWM0 on the RPI3
      • Still to be done
        • Power 1.8V, 3.3V, 12V
        • SD card
        • HDMI
        • USB and a USB Hub
        • Break out all the pins
        • Test points for clk signals and data streams
  • Stephen has a challenge for the listeners.
    • Goal: Design for a ring of LEDs that surround a control knob on a synthesizer and light up according to the position of the knob
    • Requirements
      • The circuit must connect to a potentiometer (this can be a dual gang version) example: rv16a01f
      • The ring of LEDs must be centered on a 12mm radius around the potentiometer.
      • Whole circuit must not be larger 1.2” W x 1.2”H x 1.2”D
      • PCB can solder directly to pins on potentiometer
      • Multiple PCBs is acceptable if needed
      • Color of the LEDs does not matter although green or red is preferable
      • Number of LEDs is 16 minimum and 32 maximum
      • LEDs are arranged on a 300 degree arc (potentiometer has 300 degrees of rotation) starting at 240 degrees and ending at -60 degrees
      • The circuit will receive external 5V power so it must have through hole pads for power and gnd
      • CHEAP CHEAP CHEAP! Do this for as cheap as possible
  • Rapid Fire Opinion (RFOs)
    • Revealing Capcom’s Custom Silicon Security – Hackaday
      • Capcom developed their arcade boards to die with their secrets through a “suicide” system. System name CPS2
      • Basically all the game code was encrypted and the key was stored in volatile ram kept alive by a battery.
      • Reminds Parker of the reflow oven that MacroFab currently use.
    • NXP chip checks your booze – Electronics Weekly
      • The Tag uses NXP’s NTAG 213 Tag Tamper technology which checks the origin of the bottle, detects if the bottle has been opened, and creates an URL for the bottle.
      • Stick it on, and if someone tries to remove it, the NFC chip will separate from the tag, rendering it unusable.
      • Example Tag that uses the NTAG213
      • Datasheet
    • IoT Startup Bricks Customers Garage Door Intentionally – Hack A Day
      • Garadget remotely bricked an unhappy customer’s WiFi garage door for giving a bad Amazon review and being rude to company reps.
      • “Technically there is no bricking, though,” the rep replied. “No changes are made to the hardware or the firmware of the device, just denied use of company servers.”
      • What happens when this fine firm to go bankrupt? Do all their openers stop working?

Special thanks to whixr over at Tymkrs for the intro and outro!