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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 Kassutronic's KS-20 VCA MK's VCA Everything by Hagiwo (quantizer, filters, noisemakers, etc) MIDI-to-CV, either over USB or directly over 5-pin DIN (with optoisolator) What we build next? Pretty confident we do know we need a flat but not some kind of routing control signals (trigger, gate and CV routing f12031bb4117bdc0bfa93734f5e1f978a14297b0 edits README.md file adds README.md file adds README.md file again README.md | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | J7 | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x2 (see [build notes](build.md)) | | | | J1 | 1 | Conn_01x10 | Pin header, 2.54 mm, 1x2 (see build notes) 1 SIP socket, 2.54 mm, 1x2 (see [build notes](build.md | | R3, R21, R27, R28 R4, R6, R7 | 3 | A1M | Potentiometer | | J3 | 1 | B10k | Potentiometer | | J12 | 1 nF | Unpolarized capacitor | | | R24, R26, R28 | 3 | 22k | Resistor | | R30 | 1 | SW_Push | Push button switch with ground pin http://www.ckswitches.com/media/1479/kmr2.pdf tactile push button, 6x6mm e.g. PHAP33xx series, height=13mm FS5700 series pushbutton footswitch, DPDT, https://www.e-switch.com/system/asset/product_line/data_sheet/226/FS5700.pdf Switch with LCD screen K switch normally-open pushbutton push-button LED D MEC 5G single pole normally-open illuminated tactile switch SPST angled PTS645VL58-2 LFS tactile switch Wurth Wuerth Ultraminiature Surface Mount Fuse with Clip, 4.2 x 11.1 mm, Time-Lag T, 250 VAC, 125 VDC (https://us.schurter.com/bundles/snceschurter/epim/_ProdPool_/newDS/en/typ_UMT_250.pdf Surface Mount Single Row 2.54mm (0.1 inch) Pitch PCB Connector, M20-7810845, 8 Pins (http://www.molex.com/pdm_docs/sd/559350210_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for 2 times 0.15 mm² wires, basic insulation, conductor diameter 2.4mm, outer diameter 2.7mm, see http://www.metz-connect.com/de/system/files/productfiles/Datenblatt_312051_RT045xxUBLC_OFF-022759T.pdf, script-generated with , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block WAGO 236-605, 45Degree (cable under 45degree), 6 pins, pitch 5mm, size 82.3x14mm^2, drill diamater 1.3mm, pad diameter 2.5mm, hole diameter 1.3mm, length 11.3mm, width 3.0mm solder.

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