Blinding LEDs and Bypass Capacitors of Another Kind

January 6, 2017 Hosted by Parker Dillmann, Stephen Kraig

On this Episode, Parker gets blinded by LEDs and Stephen learns Eagle! Also bypass caps free of charge.

  • Last week Stephen and Parker asked listeners for names for the two conference rooms so far these are the suggestions.
    • Tony the DIYer – MacMinor and MacMajor. Some platforms the c struct that holds the mac address specifies it as a pair of major (32 bit) and minor (16 bit) values.
    • Justin Knight – pagoda for the smaller room since it doesnt have chairs.
    • Hertz and Mega Hertz
    • Vcc and Vdd
    • Power and Ground
    • SDA and SCL
    • TX and RX
    • Conferance McConferance Face
  • Look for an online poll soon for the name!
  • Parker was testing a customers LED board earlier this week. Fed up with blinding himself with the bright LEDs he decided to wear a welding mask. See Figure 1. The helmet can be found on amazon.
  • Parker took a welding class at TXRX Hackerspace.
  • Stephen has been working more on “The Greatest Resistor….in the world.”. Stats below! See Figure 2.
    • Power:
      • 0.0625w
      • 40,000 resistors = 2.5kW
      • V = SQRT(P*R) = 5000V @ 0.5A
    • Voltage:
      • each resistor is 50v so 200 in series = 10kV
      • Temp Coef: 100ppm
    • Eagle File Size: 3.888 Mb which is 40,485 lines
  • Space Echo just needs calibration. Anyone know how to generate these specs?
    • Feed sin wave of -50 dBm into input (See Pg 16-18 of service manual).
    • Space Echo RE-201 Service Manual
  • Possible Thermal Camera to look at the heat up during powering? What kind of resolution would that camera need to be?
  • Razer’s Project Valerie is a radical three-screen laptop that unfolds with robot arms.
    • Tri screen laptop
    • Mechanical Keyboard
  • Tesla turns on the Gigafactory. More than 2,900 people are already working at the 4.9 million square-foot facility, and more than 4,000 jobs. No info about the batteries yet.
  • The Other Kind of Bypass capacitors.
    • Article not about normal bypass / decoupling caps but about feedback caps in circuits.
    • Other words bypass caps for feedback circuits.
    • Opamps have these internal feedback capacitors to reduce the high-frequency gain of the op-amp, in order to allow the amplifier to have a predictable transfer function that is stable at unity-gain.

Hosts: Parker Dillmann, Stephen Kraig

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