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Straightforward build: one op-amp, four transistors and some example modules 811ef45c764021f623b8bb59234df1314fce4e91 12V, -12V and ground needed, probably up to the PSU? -Consider: 1 simple on/off switch/button/knob/etc. - 2 x 6mm drills 3 pin Molex connector | | Tayda | A-553 | | | | C13 | 3 | 100R | Resistor | | Tayda | A-111 | | | | Tayda | A-3588 | | C10 | 1 | 10nF | Unpolarized capacitor | Tayda | A-2939 | | | | | R2, R5 | 2 | 1nF | Film capacitor | | | Tayda | A-1157 or A-2425 | | | R31 | 1 | B10k | \*\*Potentiometer, 9 mm vertical board mount OR: | | R14 | 1 | Conn_01x04 | Pin header, 2.54 mm, 1x2 (see [build notes](build.md | | | Knobs | | | S2 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x2 (see [build notes](build.md)) | | U3 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x10 Pin socket, 2.54.

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