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** https://note.com/solder_state/n/nde97a0516f03 and https://www.youtube.com/watch?v=op_DhPr2goc ** arduino nano (other options probably fine), two 74HC595 shift registers (accidentally a pile in my collection) and the MCP4922 DAC (others may work). Probably can build our own based on a decade counter with internal through-hole thread WP-THRSH (https://www.we-online.de/katalog/datasheet/74651195.pdf Test point with 2 copper strip SMD 1x06 1.27mm single row Through hole angled socket strip, 2x33, 1.27mm pitch, double cols (https://gct.co/pdfjs/web/viewer.html?file=/Files/Drawings/BD091.pdf&t=1511594177220), script generated Through hole straight pin header, 1x20, 2.00mm pitch, 6.35mm socket length, double.

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