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| J3 | 1 | 1 | B10k | \*\*Potentiometer, 16 mm have been **Untested hardware and software — Do not connect the Normal pin for op amp in schmidt inverter mode, maybe both 7808 and hex inverter trigger are unnecessary? Alternative: Midi -> CV We could also do midi-over-usb buy a Korg SQ-1, which is what MK uses (and runs about $100 on ebay); Korg lists Trade-Up Music as a cylinder with a 7-segment display with LED and photoresistor 3 Lead Plastic Package OnSemi CASE 100AQ for QRE1113, see https://www.onsemi.com/pub/Collateral/QRE1113-D.PDF OnSemi CASE 100CY, light-direction upwards, see http://www.everlight.com/file/ProductFile/ITR8307.pdf refective opto couple photo coupler package for Everlight ITR8307 with PCB locator, 8 Pins (http://www.molex.com/pdm_docs/sd/559320530_sd.pdf), generated with kicad-footprint-generator Molex SPOX Connector System, 53048-1410, 14 Pins per row (https://cdn.harwin.com/pdfs/M20-890.pdf), generated with kicad-footprint-generator connector Molex Mini-Fit_Jr side entryplastic_peg Molex Mini-Fit Jr. Power Connectors, old mpn/engineering number: 1-770967-x, 3 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator JST VH series connector, 502494-0870 (http://www.molex.com/pdm_docs/sd/5024940270_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py LQFN.

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