D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 100V 0.15A standard switching diode, DO-35 Switch, triple pole double throw, right angle, http://spec_sheets.e-switch.com/specs/P040170.pdf Switch, single pole double throw | | | | | U3 | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | U1 | 1 | B10k | \*\*Potentiometer, 16 mm vertical board mount | | | R3, R21, R27, R28 R4, R6, R7, R30, R31 | 1 | SW_3PDT_x3 | Switch, single pole double throw, separate symbols | | C10 .
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