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LEDs K switch dual-pole double-throw spdt ON-ON D Push button switch, generic, two pins | | J1 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | U2 | 1 | 100k | Resistor | | R109, R111, R113 | 3 | 22k | Resistor | | R17, R19 | 2 Internal clock with manual control. - Clock rate (B100k) (not sure yet which 2 pins LED, diameter 3.0mm.

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