Labels Milestones
BackB20k | Potentiometer | | | J1 | 1 | B20k | Potentiometer | | S1 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 | | S1 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | Tayda | A-2939 | | | | R21, R22, R23 | 3 | 1k | Resistor | | | | Q1, Q2, Q3, Q4, Q5 | 5 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | | R25, R27, R29 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)