I begin to reverse engineer the power supply, battery pack option, and AC mains conversion to 240V on the Audio Control SA-3050A.
Watch the full video for Part 1 on YouTube for all the details, there is a second video coming soon showing the actual design and build of the battery pack and 240V power supply system.
YouTube Video: https://youtu.be/veOGS1QI3AY
Files from a similar unit showing circuitry, sent to me by Kim: https://defs.link/?u=aff385
I have finished (mostly) the leakage tester project, the final video is scheduled to go live on Saturday morning.
I had a couple of weird issues I had to resolve, I was seeing skewed voltage and current readings at higher levels. The zener diodes that I was using to clamp the inputs of the Arduino as protection were turning on too soon and starting to clamp, effectively changing the resistor divider ratios, I ended up removing the voltage sensing ones, and changing the current sensing one to a 6.2V instead.
The final design will need avalanche diodes, probably 5.6V rated.