I just put together all the units I’ve been building. I just sticked the SSS sequencer, the PT39 delay, the 3080 Phaser, the Grand-Mixer, the 808 Kick Clone and the Nano-B synths onto a piece of plywood. Here is how it sounds through my iPhones mic and Youtube audio encoding.

CA3080 4 Stages Phaser

I just love Electro-Harmonix phasers such as the Small Stone or the Electric Mistress.. I found these schematics to build a Small Stone replica using the CA3080 Operational Transconductance Amplifiers: http://www.tonepad.com/project.asp?id=11 The build on a breadboard looks like this: And the sound is great, here’s a demo using a great song by Adrian Nation, Five Fingers Rapid:  

Delays lays lays

My my first effect build I wanted to do a delay so I went and shopped around for designs. I found some cool ones there, based on the cheap PT2399: http://www.diystompboxes.com/smfforum/index.php?topic=60662.0 http://www.tonepad.com/getFile.asp?id=98 And here’s the PT2399 specs sheet: http://www.princeton.com.tw/Portals/0/Product/PT2399_1.pdf I build two different designs from very simple to a bit more sophisticated. The first has only a time control and…
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The OP-HPF High Pass Filter

I wanted to have an Isolator-style high pass filter device to play with. I found this design at https://www.eeweb.com/blog/circuit_projects/20hz-to-200hz-variable-high-pass-filter that uses a very common op-amp, the TL072. And there I found the design for a 555-driven negative voltage generator, needed for the TL072: https://www.allaboutcircuits.com/projects/build-your-own-negative-voltage-generator/ The only case I got is that Walkers biscuits box. Well English. I punched two holes to mount a rotary…
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