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1990999 (https://www.phoenixcontact.com/online/portal/gb/?uri=pxc-oc-itemdetail:pid=1990999), generated with kicad-footprint-generator ipc_gullwing_generator.py 54-lead TSOP typ II package TSSOP, 4 Pin (http://www.ixysic.com/home/pdfs.nsf/www/CPC1017N.pdf/$file/CPC1017N.pdf), generated with kicad-footprint-generator Molex Pico-Clasp series connector, 53398-1371 (http://www.molex.com/pdm_docs/sd/533980271_sd.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-107-02-xx-DV-TE, 7 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for a press-on type knob (rather than using a microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a ring arrangement; 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 4040 binary counter, but separated quantizer might not https://www.youtube.com/watch?v=3v1yTFsypqA Sample & Hold MK's S&H, though maybe move the arrow into its pointing direction. Positive or negative.

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