Labels Milestones
BackC5, C6, C8, C9 | 5 | 2N3904 | Small Signal NPN Transistor, TO-92 | | | | | | | | R1, R10, R11 | 3 | 22k | Resistor | | | | R3, R21, R27, R28 R4, R6, R7, R30, R31 Switch, dual pole double throw Precision Timers, 555 compatible, PDIP-8"/>