OK, I swear, I’m done subjecting y’all to this dumb little circuit. I’ve added a switchable range, which gets me down to ~ .1Hz, and another pair of transistors fro a clean output pulse of about 8v, suitable for Eurorack triggering. Oh, and it’s running at 12V now. Not sure if I’m going to bother making this, or just move on.
This was a really terrible example of how to design something; I just kept bolting on stuff instead of having a clear plan at the beginning. That being said, I’m not sure how much differently I would have designed this if I was trying to do the same thing starting from scratch. I probably would have thought more carefully about certain values, rather than the trial & error experimentation I did. Whatever, it kept me off the streets and out of trouble.
I did the schematic in Diptrace. The free version is useful enough for small stuff, the next tier up is reasonably priced, and it’s not a subscription like Eagle (f’ing Autodesk). It also works most like a modern piece of software should, in that you can intuit basic operation. I tried KiCad a while back, but it just seemed so willfully obtuse. The one bummer about Diptrace is in order to make it cross platform, they bundle it in Wine. I’m grateful they went through the trouble, but I can’t for the life of me figure out how to print a PDF from it’s print dialog box, so I just did a screen-shot.
