MEP EP#55: Unnecessary Engineering

Parker Dillmann |   |  Greatest Resistor In The World, MacroFab, MEP, Open PLC, Podcast, Solar Roadways, SparkFun, SparkX, Spooky Pinball, Suction Tube for Reverse Axial Withdrawal, Thyristor

MacroFab Engineering Podcast

Stream:

Download: MP3
RSS Feed: Link
Twitter: @MacroFab

Runtime: (36:40)

Hosts:
Parker Dillmann
Stephen Kraig

Guests:
N/A


Figure 1: Stephen's din rail mounted PCB with his circuit on it. It converts the PWM signal from a MCU to a analog signal that the motor controller can use.
Figure 1: Stephen’s din rail mounted PCB with his circuit on it. It converts the PWM signal from a MCU to an analog signal that the motor controller can use.

Figure 2: Schematic of the circuit.
Figure 3: Waveform of the PWM to analog voltage output.
Figure 3: Waveform of the PWM to analog voltage output.
Figure 4: Waveform of the PWM to analog voltage output.
Figure 4: Waveform of the PWM to analog voltage output.

Podcast Notes

  • We would love to hear from our listeners. Tell us what you think, your current projects, any topics you would like us to cover, or just say “hello”. To reach us follow us on Twitter @MacroFab or send us an email at podcast@macrofab.com.
  • Derek long time listener sent us an email!
    • Twitter handle @TCurrentSource
    • Emailed us last week that he picked up a 1200V SCR Thyristor.
  • Parker
    • Wrote a capacitor article about polarity and silkscreen markings.
    • Started working on a new Pinball Controller with Spooky Pinball.
  •  Stephen
    • Resistor Resistor arrived. Made a goof on it… but it is fixable.
    • Motor controller for one of our benches. The Open PLC will be controlling it. It is basically a fancy pwm filter, it’s an optoisolator into a dual transistor config with an r/c filter. See Figure 1, 2, 3, and 4.
  • RFO
    • Solar Roadways…yes again with this topic.
      • 2 year experiment in France, called Wattway.
      • Single lane road stretching one mile long cost €5 million, or roughly $5.4 million in U.S. currency.
      • Covered in 2,880 photovoltaic panels, produce 280 megawatt hours (MWh) of energy each year and an electrical output of 767 kilowatt hours (kWh) per day.
      • It’s enough to power…wait for it…the streetlights.
      • That’s $19.29 per kWh. We pay four cents per kWh.
      • Costs about $3million per mile for a two-lane road.
    • SparkFun launches SparkX
      • Plan is to rapidly iterate on ideas and new products.
      • The 3 commandments of SparkX
        • Speed over polish
        • Unabashed failure
        • Go
      • Maybe get Nate on the podcast?
    • McDonalds reinvents the straw
      • Suction tube for Reverse Axial Withdrawal
      • 3D printed straw that fixes problems with drawing thicker liquid out of a cylindrical shaped vessel.
      • The fluid dynamics image is great.

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