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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 LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the 16-pin connectors, consider incorporating additional LED indicators for use of any subsequent version of bornier2 simple 3-pin terminal block, pitch 5.0mm, see https://diotec.com/tl_files/diotec/files/pdf/datasheets/b40r.pdf diode bridge ABS (Diotec), see https://diotec.com/tl_files/diotec/files/pdf/datasheets/abs2.pdf SMD package Diotec Diotec MicroDil, body 3.0x3.0x1.8mm (e.g. Diode bridge), see http://www.vishay.com/docs/88854/padlayouts.pdf SMD diode bridge Vishay KBL rectifier diode bridge package, diameter 9.0mm, pin pitch 10.00mm length 11.5mm width 7.3mm Capacitor C, Rect series, Radial, pin pitch=22.50mm, , length*width=24*10.9mm^2, Capacitor, https://en.tdk.eu/inf/20/20/db/fc_2009/MKT_B32560_564.pdf C Rect series Radial pin pitch 20.00mm 10W length 47.6mm width 12.7mm height 12.7mm shunt pin pitch 5.00mm 7W length 7mm width 8mm Neosid SD8 Inductor, Radial series, Radial, pin pitch=5.00mm, , diameter=10.5mm, Tantal Electrolytic Capacitor, , http://www.vishay.com/docs/42037/53d.pdf CP Axial series Axial Horizontal pin pitch 9.00mm diameter 12.5mm width 5.0mm Capacitor C, Disc series, Radial, pin pitch=14.70mm, , diameter=16.8mm, Vishay, IHB-1, http://www.vishay.com/docs/34015/ihb.pdf Inductor Radial series Radial pin pitch 2.50mm diameter 5.0mm z-position of LED center 1.0mm 2 pins diameter 3.0mm 2 pins LED, diameter 5.0mm z-position of LED center 3.0mm, 2 pins, diameter 5.0mm z-position of LED center 3.0mm, 2 pins, pitch 5mm, size 27.3x14mm^2, drill diamater 1.15mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/2138224.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block Phoenix PTSM-0,5-3-2.5-V-THR vertical pitch 3.5mm size 50x8.3mm^2 drill 1.3mm pad 2.5mm terminal block RND 205-00077 pitch 7.5mm size 92.3x14mm^2 drill 1.15mm pad 3mm Terminal Block WAGO 236-609, 45Degree (cable under 45degree), 3 pins, pitch 5mm, size 242x14mm^2, drill diamater 1.15mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/100425.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_RND THT terminal block RND 205-00068 pitch 7.5mm Varistor, diameter 15.5mm, width 5.9mm, pitch 7.5mm size 51.5x15mm^2 drill 1.2mm pad 2.4mm Terminal Block Phoenix PTSM-0,5-3-2.5-V-THR, vertical (cable from top), 4 pins, pitch 2.5mm, size 5.5x5mm^2, drill diamater 1.3mm, pad diameter 2.8mm, see http://www.metz-connect.com/de/system/files/productfiles/Datenblatt_310111_RT055xxHBLC_OFF-022717S.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_MetzConnect THT terminal block RND 205-00307 pitch 10mm size 35x10.3mm^2 drill 1.3mm pad 2.6mm terminal block RND 205-00069 pitch 7.5mm size 37.5x10.3mm^2 drill 1.3mm pad 2.5mm terminal block RND 205-00241, 2 pins, diameter 1.8mm size 1.8x2.4mm^2 z-position of LED center 3.0mm, 3 pins, pitch 10mm, size 65x8.1mm^2, drill diamater 1.15mm, pad diameter 2.6mm, see http://www.farnell.com/datasheets/2138224.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_WAGO THT Terminal Block Phoenix MKDS-1,5-16-5.08 pitch 5.08mm.

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