Timer, Op-amp & Optoelectronic Circuits & Projects
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One of the "Engineer's Mini Notebook" series by Forrest Mims. Numerous easy-to-build circuits for the breadboard. Not stompbox-specific, but many of the circuits can be hacked for FX use. We necessarily charge list price. However, if you buy here, we will gladly respond to reasonable questions like "what components do you suggest for trying the idea on page nnn?" A printed "companion" that includes this kind of commentary is on my list of future projects.