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BackHttps://www.cuidevices.com/product/resource/pdf/sj1-352xn.pdf TRS audio jack stereo horizontal waterproof 6.35mm (1/4 in) Vertical Jack, 2 Poles (Mono / TS) | | | J12 | 1 Hardware/lib/aoKicad | 1 Hardware/lib/aoKicad | 1 uF | Polarized capacitor | | R30 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8"/>