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Be added] ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: [front](Docs/precadsr_layout_front.pdf), [back](Docs/precadsr_layout_back.pdf) * [BOM](Docs/precadsr_bom.md) * [Build notes](Docs/build.md) How to use your choice of 9 mm vertical board mount OR: | | 1 | SW_Push | Push button switch, generic, separate symbols, four pins D Push button switch, generic, two pins | | | | | | | | C2, C5, C6, C8 | 4 | 100k | Resistor | | J3 | 1 | 100k | Resistor | | Tayda | A-804 | | | | U3 | 1 | TL074 | Quad operational amplifier, DIP-14 main MK_VCO/Fireball/Fireball_panel.kicad_pro 505 lines | Refs | Qty .

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