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Back**Component Count:** 76 | Refs | Qty | Component | Description | Manufacturer | Part | Vendor | SKU | | S3 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 Quad operational amplifier, DIP-14 A-1135 2 8 pin DIP socket A-001 1 14 pin DIP socket A-004 4 Knobs Screws, nuts, and spacers (see build notes) 1 SIP socket, 2.54 mm, 1x2 (see [build notes](build.md | | | J7, J8, J9 | 1 Hardware/lib/aoKicad | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)"/>
- 6.35181 -0.410784 7.71954 vertex.
- 2 Button_Switch_SMD SW_SPST_EVQP2 Light Touch Switch, https://industrial.panasonic.com/cdbs/www-data/pdf/ATK0000/ATK0000CE28.pdf.
- 2x23 2.00mm double row surface-mounted straight pin header.