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BackBytes Docs/precadsr_bom.md | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | Tayda | A-3186 | | | Tayda | A-2939 | | | D1, D2 | 2 | 4.7k | Resistor | | L1 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 | | R25 | 1 | SW_Push | Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8"/>