I did the same! IIRC, I went off a design from the first edition of Electronic Gadgets for the Evil Genius[0]. Excellent book for the budding electronics hacker

I did the same! IIRC, I went off a design from the first edition of Electronic Gadgets for the Evil Genius[0]. Excellent book for the budding electronics hacker. [0] https://www.abebooks.com/signed-first-edition/Electronic-Gadgets-Evil-Genius-Iannini-Bob/30752209353/bd https://www.abebooks.com/signed-first-edition/Electronic-Gad...