https://www.eddybergman.com/2020/01/synthesizer-build-part-16-sample-and.html
Eddy Bergman.com: Synthesizer Build part-16: SAMPLE and HOLD.
Build sample and hold circuit schematics stripboard layout for DIY modular synthesizer
eddy bergmansynthesizerbuildpartsample
https://www.eddybergman.com/2025/12/suboscillator.html
Eddy Bergman.com: Synthesizer Build part-69: FEATURE RICH SUB-OSCILLATOR.
Stripboard version of the thomas henry sub-oscillator from vco maximus with layouts and build description
eddy bergmanfeature richsynthesizerbuild