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Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for 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 Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on https://www.schmitzbits.de/ms20.html which is implemented by public license practices. Many people have made generous contributions to the previous module with inputs made for an e-drum kit. Period: 3 months 1 day 08c0726655 Added BCN, Something Positive From e89a2a057de6d0325362ec61c1fe0ab24a803b20 Mon Sep 17 00:00:00 2001 Subject: [PATCH] Add comments and graphics symbols to schematics Hardware/PCB/precadsr/potsetc.sch | 4 Hardware/PCB/precadsr/potsetc.sch | 663 Hardware/PCB/precadsr/precadsr.net | 147 .../CP_Radial_D6.3mm_P2.50mm.kicad_mod | 164 .../C_Disc_D3.0mm_W1.6mm_P2.50mm.kicad_mod | 33 ....5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2.kicad_mod | 35 .../PCB/precadsr/ao_tht.pretty/DIN5.kicad_mod | 21 .../DIP-14_W7.62mm_Socket_LongPads.kicad_mod | 58 .../DIP-16_W7.62mm_Socket_LongPads.kicad_mod | 60 .../DIP-6_W7.62mm_Socket_LongPads.kicad_mod | 50 .../DIP-8_W7.62mm_Socket_LongPads.kicad_mod | 52 .../DPDT-toggle-switch-1M-seriesx.kicad_mod | 26 .../precadsr-panel-MaskBottom.gbs | 75 Panels/FireballSpell_Large_bw.png.svg | 57 create mode 100644 Hardware/Panel/precadsr-panel/precadsr-panel.kicad_pcb create mode 100644 Hardware/Panel/precadsr_panel_al_Gerbers/precadsr_panel_al-Edge_Cuts.gbr create mode 100644 Panels/Font files/Quentincaps.ttf Normal file Unescape Schematics/SynthMages.pretty/SOCKET_3_PIN_HEADER_NORMAL.kicad_mod Normal file Unescape Schematics/SynthMages.pretty/Potentiometer_Alpha_RD901F-40-00D_Single_Vertical_CircularHoles_Shaft_Centered.kicad_mod Normal file.

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