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VCA Probably a straightforward build: one op-amp, four transistors and some supporting components. ~$6 in parts, needing only one side when convenient. You can http://mozilla.org/MPL/2.0/. If it is not possible or desirable to put the output jacks 2eebdf7ecf Add four more switches/buttons, move LED drivers onto PCB Latest commits for file Examples/EG_MANUAL.pdf schematic start, and some example modules Envelope/Envelope.kicad_pcb | 2 | 10R | Resistor | | | | | | R31 | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-14/SOIC-14 Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | Tayda | A-3588 | | | | | | | | R1, R2 | 2 .../Unseen Servant/Unseen Servant.kicad_prl | 2 | 47k | Resistor | | J1 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | L1 | 1 | Conn_01x02 | SIP socket, 2.54 mm.

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