Labels Milestones
BackR31 Switch, dual pole double throw | | R1, R2 | 2 | 1M | Resistor | | | | R21, R22, R23 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | J3, J4, J5 | 3 | A1M | Potentiometer | | | | C2 | 1 | B20k | Potentiometer | | | Tayda | A-1847 | | | | | R21, R22, R23 | 3 | A1M | Potentiometer | | | R15, R17, R19 | 2 | 47k | Resistor | | Tayda | A-1157 or A-2425 | | U1 | 1 | SW_SPDT | Switch, single pole double throw, separate symbols