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BackArrangement; a challenging PCB and/or print job! See PDF at https://raw.githubusercontent.com/kassu/kassutronics/master/documentation/Quantizer/Quantizer_Build_Docs_1.1A.pdf for explanation about PWM smoothing; essentially a 4-stage RC network but with buffering between (some) stages. Needs a TLC7524/AD7524 (a simple DAC that's still sorta analog) and a momentary-on button to advance the step manually. This requires Futura font files. The Filmoscope Quentin typeface 900028d3cf Futura BT font files ... Delete 'Panels/futura light bt.ttf' Delete 'Panels/futura medium bt.ttf' Delete 'Panels/futura light bt.ttf' Delete 'Panels/futura light bt.ttf' 4fd9d8b7bf Delete 'Panels/Futura XBlk BT.ttf' Panels/Futura XBlk BT.ttf differ Binary files a/3D Printing/AD&D 1e spell names in Filmoscope Quentin/Panels/FIREBALL VCO.png' 811ef45c76 schematic start, and some example modules Envelope/Envelope.kicad_pcb | 2 aoKicad | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x4 | | Tayda | A-1157 or A-2425 | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23, R24 | 4 .../PCB/precadsr_Gerbers/precadsr-PTH.drl | 4 | 1M | Resistor | | Tayda | A-2939 | | C3 | 1 | B10k | Potentiometer | | | Tayda | A-1121 | | Tayda | A-1624 or A-2969 | | | D1, D2 | 2 aoKicad | 2 | 47k | Resistor | | | J9 | 1 | 2_pin_Molex_connector | KK254 Molex header 2.54 mm spacing"/>