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BackDouble throw, illuminated paddle, red and green LEDs K switch dp3t ON-ON-ON D Switch, dual pole triple throw, 3 position switch, SP3T K switch triple-pole double-throw DPDT 3pdt ON-ON D Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8 | | | | R31 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x2 (see build notes) 1 SIP socket, 2.54 mm, 1x4 Light emitting diode, 5 mm | | J1 | 1 | SW_SPDT | Switch, single pole double throw, separate symbols Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8"/>