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Back+ 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 arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a gate. Main synth_tools/Schematics/SynthMages.pretty/6.3mm_NPTH_MAXJLCPCB.kicad_mod 24 lines Binary files /dev/null and b/Images/IMG_6770.JPG differ Binary files /dev/null and b/Panels/Font files/futura medium condensed bt.ttf | Bin QuentinEF.ttf => Panels/QuentinEF.ttf | Bin 0 -> 11675 bytes .../FIREBALL VCO.png | Bin 0 -> 138868 bytes Docs/precadsr_bom.md | 4 .../precadsr_panel_al.kicad_pcb | 2510 .../Bigger_Push_Switch_Hole_NPTH.kicad_mod | 17 .../fastestenv_LED_Hole.kicad_mod | 17 ...estenv_Panel_Dual_Mounting_Holes.kicad_mod | 20 ...o_Panel_Dual_Mounting_Holes_NPTH.kicad_mod | 20 ...o_Panel_Dual_Mounting_Holes_NPTH.kicad_mod | 20 ...Panel_Dual_Slotted_Mounting_Hole.kicad_mod | 35 ..._Dual_Slotted_Mounting_Hole_NPTH.kicad_mod | 35 .../PinHeader_1x03_P2.54mm_Vertical.kicad_mod | 36 Schematics/Fireball.kicad_sch | 400 (50 "User.1" user (51 "User.2" user (52 "User.3" user (53 "User.4" user (54 "User.5" user (55 "User.6" user (56 "User.7" user (57 "User.8" user (58 "User.9" user Component Count: 76 Refs C2, C5, C6, C8 | 4 Synth Mages Power Word Stun.kicad_sch From 085327769df1923053fc21adb0ef584f908b8264 Mon Sep 17 00:00:00 2001 Subject: [PATCH] PCB initial layout, no traces "silk_text_size_h": 1.0, "silk_text_size_v": 1.0, "silk_text_thickness": 0.15, "silk_text_upright": false, "zones": { "min_clearance": 0.5 } }, updates to rev 2 beta d89db83df13552281151487e636d3175f5aa0e7b updates to rev 2 d5bfb6e27b2dae54104d76ea378df4de16af205b New Pull Request