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BackNano 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 microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the right sub-panel top_row = height / 2 + 3 + tolerance*8; echo("Left panel:", left_panel_width, " with spacing ", left_panel_spacing); right_panel_width = width_mm - thickness*2.2; footprint "SLIDE_POT_0547" (version 20211014) (generator pcbnew footprint "POT_2_PIN_Header" (version 20211014) (generator pcbnew footprint "PinSocket_1x02_P2.54mm_Vertical" (version 20211014) (generator pcbnew f1ff8406b4 Delete '3D Printing/Panels/image.png' 3D Printing/Panels/image.png Normal file Unescape Hardware/PCB/precadsr/potsetc.sch Normal file Unescape Hardware/PCB/precadsr/ao_tht.pretty/Perf_Board_Hole.kicad_mod Normal file Unescape Hardware/PCB/precadsr/potsetc.sch Normal file Unescape Hardware/Panel/precadsr_panel_al_Gerbers/precadsr_panel_al-F_SilkS.gbr Normal file Unescape Hardware/Panel/precadsr-panel-Gerbers/precadsr-panel-MaskTop.gts Normal file Unescape Hardware/Panel/precadsr_panel_al/fp-lib-table Normal file View File 3D Printing/Cases/Eurorack Modular Skeleton History The body text.
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