Synth

BH-101 Synthetiser

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This is my first “real” voltage-controlled synth build using the CEM3340 clone the AS3340: https://electricdruid.net/cem3340-vco-voltage-controlled-oscillator-designs/#comment-20138 The CEM3340 was the oscillator used in the famous Roland SH-101 and MKS-80. […]

Fx

The OP-HPF High Pass Filter

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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 […]