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PT-6-V Potentiometer, horizontal, Bourns 3009Y, http://www.bourns.com/docs/Product-Datasheets/3009.pdf Potentiometer horizontal Bourns 3006P Potentiometer, horizontal, ACP CA6-H2,5, http://www.acptechnologies.com/wp-content/uploads/2017/06/01-ACP-CA6.pdf Potentiometer vertical Bourns 3314J Potentiometer, vertical, Bourns 3269W, https://www.bourns.com/docs/Product-Datasheets/3269.pdf Potentiometer vertical Vishay TS53YL Potentiometer, horizontal, Trimmer, RM-063 http://www.runtron.com/down/PDF%20Datasheet/Carbon%20Film%20Potentiometer/RM065%20RM063.pdf Potentiometer, vertical, ACP CA9-V10, http://www.acptechnologies.com/wp-content/uploads/2017/05/02-ACP-CA9-CE9.pdf Potentiometer vertical hole Piher PT-6-V Potentiometer, vertical, top-adjust, Bourns 3314J, http://www.bourns.com/docs/Product-Datasheets/3314.pdf Potentiometer, vertical, shaft hole, allowing to create cutouts around the top (mm h_margin = hole_dist_side + thickness; width_mm = hp_mm(width); // where to put the output jacks working_height = height * rotate_vector_cos, rotate_vector_sin * rail_depth] // top horizontal rib // middle horizontal rib // h_wall(h=1.6, l=right_rib_x); // middle-bottom h rib // h_wall(h=1.6, l=right_rib_x); // middle-bottom h rib // h_wall(h=1.6, l=right_rib_x); // middle-bottom h rib // h_wall(h=1.6, l=right_rib_x); // middle horizontal rib // h_wall(h=4, l=right_rib_x); // one more vertical to mount 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 arduino nano (other options probably fine), two 74HC595 shift registers (accidentally a pile in my collection) and the following procedure for assembly. As usual do the lowest components first — resistors and diodes — then sockets, ceramic capacitors, power header, transistors, film caps, electrolytic caps... Something like that. Consider: 1 simple on/off switch/button/knob/etc. - 2 x switching (normalling) stereo jack and switching ground contact, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3mbv-b B Series, 4 pole chassis connector, black D-size flange, self tapping.

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