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Circuit Break - A MacroFab Podcast
Trailer
Bonus
Episode 49
Season 1
EP#49: Blinding LEDs and Bypass Capacitors of Another Kind
Podcast Notes
- 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
- Power:
- 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.
Special thanks to whixr over at Tymkrs for the intro and outro!