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BackSimple one, using 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 VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Latest commits for file Fireball/Fireball.kicad_sch Added input resistor for sync; placed everything on PCB with exploratory 8hp layout 2x Sockets, all three pins need wires: glide in (j16/j17) // cv range (sw12 // 1 rotary switch - this needs a _big_ knob, these are for steps only row_1 = v_margin+12; row_2 = row_1 + vertical_space/7; cv_in_1a = [left_col, row_3, 0]; pwm_duty = [width_mm - h_margin - working_width/8, row_3, 0]; manual_2 = [left_col, row_3, 0]; manual_2 = [left_col, row_2, 0]; fm_lvl = [h_margin+working_width/8, row_3, 0]; cv_in_2b = [right_col, row_5, 0]; cv_in_2a = [left_col, row_5, 0]; cv_in_2a = [left_col, row_5, 0]; cv_in_2a = [left_col, row_5, 0]; audio_out_1 = [right_col, row_5, 0]; cv_in_2a.
- PCB and/or print job! See PDF.
- Working_increment * 4 / 5; out_row_1 .
- $img; } Fix for two bugs in Doghouse.