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Back472 aoKicad | 1 Hardware/lib/aoKicad | 1 | | Screws and spacers (see [build notes](build.md | | | | | | | J5, J12, J13 | 3 | 4.7k | Resistor | | | | | | | | | U3 | 1 | LED | Light emitting diode, 5 mm | | Tayda | A-553 | | | | J2 | 1 Hardware/lib/aoKicad | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92"/>