Quick Projects Update
Way too many projects and too little time. Luckily I had a few days off from work to make a bit of progress on several existing projects, and to start some new ones.
I designed a new Linear MOSFET board for the DC Load project. Now version 0.2 with dual MOSFETS and dual 0.5 ohm power resistors. The original single MOSFET version did meet all the requirements, but at higher loads I was not able to transfer enough heat thru the single package to the heatsink without exceeding my setpoint for junction temperature. I also compromised on the maximum load specifications for the continuous duty current and voltage. Also by changing the max load specification to 18 Volts at 10 Amps, I was able to increase the current sense resistor from 0.005 to 0.01 ohm which will improve the resolution at all current ranges.
Next step in the project is developing a 4 wire PWM fan controller and heatsink temperature monitoring using the Teensy 3.2 board.
Progress on the Quad Voltage Reference version 2 temperature controlled environment for improved stability. I still need to finish the programing of the ATTiny85 processor and implementing a PID control.
Quad Voltage Reference V 2 insulation for temperature controlled environment.
New series of projects for SDR (Software Defined Radio) reception of ADS‑B aircraft, and AIS marine ship data reception, along with some test boards for mounting voltage reference IC’s.