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Digital ** https://note.com/solder_state/n/nde97a0516f03 and https://www.youtube.com/watch?v=op_DhPr2goc ** arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a setscrew). (ShaftLength must be under the smaller board. #Kicad 7 # 2-layer, 1oz copper condition "A.Type == 'track' && B.Type == A.Type && A.Net == B.Net" condition "A.Type == 'via' && B.Type == A.Type && A.Net != B.Net" condition "A.Pad_Type == 'NPTH, mechanical' && B.Type == A.Type")) # 4-layer condition "A.Type == 'pad' && A.Fabrication_Property == 'Castellated pad'" condition "A.Net != B.Net" condition "A.Type == 'pad' && B.Type == 'track'" ; DRILL file {KiCad 5.1.10-88a1d61d58~90~ubuntu20.04.1} date Sat Aug 7 13:39:59 2021 ; DRILL file {KiCad.

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