Hi, I’m new here, but I’ll been reading this forum for years. I’ve been looking for a good way to test the ram on my various Apple II’s, Clone, and 16K RAM cards. Since I didn’t find a readymade solution, I decided to create my own and I would like your thoughts on this project. It is based on the work of several others:
To keep it simple, I use a step-up voltage module and a reverse voltage module. It’s powered through the Nano (I covered the Nano LEDs as I find these really annoying). It seems to work well, and after testing almost a hundred ram chips, I found several bad on an unused 16K card I have. I totaled up the parts cost, and it’s around $18.