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BackWith two LEDs K switch dual-pole double-throw spdt ON-ON D Screw terminal, single row, 01x03 D 2x5 pin shrouded header 2.54 mm 2x5 Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | | C3 | 1 | 100k | Resistor | | R30 | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | | C4, C5 | 2 pin Molex header 2.54 mm 2x5"/>