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Amp in schmidt inverter mode, maybe both 7808 and hex inverter trigger are unnecessary? Alternative: Midi -> CV Alternative: CV from something else use a non-metal spacer underneath alpha pots: tight, only 1/2 turn for nut 11mm - rotary, SR2511 style, with very large range of in-tune response, but comments discuss potential fixes, maybe worth it for a single 1.5 mm² wire, basic insulation, conductor diameter 1.25mm, outer diameter 2.1mm, size source Multi-Contact FLEXI-E/HK 0.127 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times 0.127 mm² wires, basic insulation, conductor diameter 2.4mm, outer diameter 3.6mm, size source Multi-Contact FLEXI-E/HK 0.127 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator Molex PicoBlade Connector System, 43045-2200 (alternative finishes: 43045-080x), 4 Pins (https://www.molex.com/pdm_docs/sd/009652028_sd.pdf), generated with kicad-footprint-generator Molex Molex 0.30mm Pitch Easy-On Type FFC/FPC Connector, For LVDS, 2.33mm Height, Right Angle, http://www.kycon.com/Pub_Eng_Draw/KDMIX-SL1-NS-WS-B15.pdf HDMI Molex Type A HDMI, Type A, Kycon KDMIX-SL1-NS-WS-B15, Vertical Right Angle, Surface Mount, ZIF, Bottom Contact FFC/FPC, 200528-0050, 5 Circuits (http://www.jae.com/z-en/pdf_download_exec.cfm?param=SJ038187.pdf), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-1030, 10 Pins per row (https://cdn.harwin.com/pdfs/M20-890.pdf), generated with kicad-footprint-generator Diode SMD 1812 (4532 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 80, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator Hirose BM24 series connector, SM08B-GHS-TB (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 4 times 1.5 mm² wires, basic insulation, conductor diameter 2.4mm, see http://www.philmore-datak.com/mc/Page%20197.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block Phoenix MPT-0,5-8-2.54 pitch 2.54mm size 23.32x6.5mm^2 drill 1.1mm pad 2.1mm terminal block RND 205-00294 pitch 5.08mm length 12mm diameter.

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