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Https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF ~$8 in parts, mostly down to PCB edge 7.4799999999999995mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 62-pin D-Sub connector horizontal angled 90deg THT male pitch 2.29x2.54mm pin-PCB-offset 9.4mm 25-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.77x2.84mm, pin-PCB-offset 14.56mm, distance of mounting holes 33.3mm, distance of mounting holes 33.3mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm pin-PCB-offset 3.0300000000000002mm mounting-holes-distance 63.5mm mounting-hole-offset 63.5mm 37-pin D-Sub connector, straight/vertical, THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 9.4mm, see http://docs-europe.electrocomponents.com/webdocs/1585/0900766b81585df2.pdf 37-pin D-Sub connector, straight/vertical, THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 9.9mm, distance of mounting holes distance 33.3mm 15-pin D-Sub connector horizontal https://katalog.we-online.de/pbs/datasheet/7499010001A.pdf 10/100Base-TX RJ45 ethernet plug 10/100/1000 Base-T Transformer Module, PT61020EL (https://www.bourns.com/pdfs/PT61020.pdf Gigabit PoE Ethernet Transformer Single SMD RF transformer, 50 ohm, 4.5 to 3000Mhz, https://www.minicircuits.com/pdfs/TC1-1-13M+.pdf WE-AGDT Auxiliary Gate Drive Transformer, 1:1:1, 11.8x8.8x4.0mm (https://productfinder.pulseeng.com/products/datasheets/P663.pdf SMT Gate Drive Transformer, 1:1:1, 8.6x6.7x3.6mm (https://productfinder.pulseeng.com/products/datasheets/P663.pdf SMT Gate Drive Transformer, 1:1:1, 8.0x6.3x5.3mm (https://productfinder.pulseeng.com/products/datasheets/SPM2007_61.pdf SMT Gate Drive Transformer, 1:1:1, 8.0x6.3x5.3mm (https://productfinder.pulseeng.com/products/datasheets/SPM2007_61.pdf SMT Gate Drive Transformer EP7, https://www.we-online.com/components/products/datasheet/750319177.pdf auxiliary gate drive transformer Transformer, horizontal core with bobbin, 14 pin, 2.49 mm pitch, 20 mm fuse holders; Vertical w/o Stability Pins; 250V; 6.3-16A (http://www.cooperindustries.com/content/dam/public/bussmann/Electronics/Resources/product-datasheets/Bus_Elx_DS_2118_HB_PCB_Series.pdf 5 mm LED 5 mm x 0.3 mm body (https://assets.nexperia.com/documents/package-information/SOD962-2.pdf https://www.nexperia.com/packages/SOD962-2.html Diode SMPA (DO-221BC), https://www.vishay.com/docs/87659/v8pa10.pdf Single phase, Bridge rectifier.

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