More small boards, ready for testing (well, almost).
The ICL8038 is an old voltage controlled “precision waveform generator” from the early seventies, a bit like a fancy 555 but with square, triangle and (piecewise linear) sine outputs. They’re no longer made, but you can get “function generator” kits for almost nothing from the usual sources.
I recently found a kit in my collection of random things I apparently had plans for, but never got around to do anything with. At first I thought I’d build the kit as is, but the output levels are a bit weird so I decided to add some level shifters. Then I googled to see if someone had done something similar, and found a Thomas Henry design that did just that, so an EasyEDA session later I had a couple of boards in my standard form factor, without having to do any calculations myself.
Henry’s build is mains powered, but I’m aiming for something a bit safer – and more compact, of course (to be continued…).