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BackR9 | 1 uF | Unpolarized capacitor | | Tayda | A-553 | | | | | R3, R21, R27, R28 R4, R6, R7, R30, R31 Switch, dual pole double throw, right angle, PTS645VL31-2 LFS C&K Button tactile switch SPST LED OFF-ON lamp D Single Pole Single Throw (SPST) switch D reed switch, default-closed D SPDT reed switch K switch normally-open pushbutton push-button Lamp D Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8 | | | R1, R10, R11 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS)"/>