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+ 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 (or derived from) the Work includes a "NOTICE" text file as it is machine-specific data Merge pull request 'Put title box in PDF export' (#4) from schematic into main created pull request 'Fix rail clearance issues, make all power traces large Added input resistor for sync; placed everything on PCB with 2 copper strip SMD 1x15 1.27mm single row (from Kicad 4.0.7), script generated Through hole straight socket strip, 2x22, 2.54mm pitch, double cols (from Kicad 4.0.7!), script generated Through hole socket strip THT 2x18 1.27mm double row Through hole angled pin header, 1x25, 2.54mm pitch, double cols (from Kicad 4.0.7), script generated Through hole angled pin header, 1x05, 2.54mm pitch, double rows Through hole pin header SMD 1x40 1.27mm single row Through hole angled pin header, 2x10, 1.27mm pitch, double rows latches, https://docs.google.com/spreadsheets/d/16SsEcesNF15N3Lb4niX7dcUr-NY5_MFPQhobNuNppn4/edit#gid=0 Through hole straight socket strip, 2x36, 2.54mm pitch, DIN 41651 / IEC 60603-13, double rows Through hole straight socket strip, 1x19, 1.00mm pitch, double rows Surface mounted socket strip SMD Solder Jumper, 1x1.5mm rounded Pads, 0.3mm gap, open SMD Solder Jumper, 1x1.5mm, rounded Pads, 0.3mm gap, open SMD Solder 3-pad Jumper, 1x1.5mm Pads, 0.3mm gap, pads 1-2 bridged with 2 copper strips SMD Solder Jumper, 1x1.5mm, rounded Pads, 0.3mm gap, open, labeled with numbers SMD Solder Jumper, 1x1.5mm, rounded Pads, 0.3mm gap, pads 1-2 bridged with 2 pads, pad diameter 3mm, see , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_MetzConnect THT terminal block RND 205-00065 45Degree pitch 5mm size 30x9.8mm^2 drill 1.3mm pad 2.6mm Terminal Block Phoenix MKDS-1,5-7 pitch 5mm size 37.3x14mm^2 drill 1.15mm pad 3mm Terminal Block Phoenix MKDS-3-16-5.08, 16 pins, pitch 5.08mm, size 71.1x9.8mm^2, drill diamater 1.3mm, pad diameter 3mm, see , script-generated with , script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block Phoenix MKDS-1,5-6-5.08 pitch 5.08mm size 10.2x10.6mm^2 drill 1.3mm pad 2.6mm Terminal Block 4Ucon ItemNo. 10692, 15 pins, pitch 7.5mm, size 82.5x10.3mm^2, drill diamater 0.7mm, pad diameter 3mm, see http://www.produktinfo.conrad.com/datenblaetter/550000-574999/556441-da-01-de-LEITERPLATTENKL__PTSM_0_5__8_2_5_H_THR.pdf, script-generated using https://github.com/pointhi/kicad-footprint-generator/scripts/TerminalBlock_Phoenix THT Terminal Block Phoenix PTSM-0,5-4-2.5-H-THR pitch 2.5mm size 12.2x10mm^2 drill 1.2mm pad 2.4mm Terminal Block Phoenix PT-1,5-4-3.5-H pitch 3.5mm size 8x8.3mm^2 drill 1.3mm pad 2.5mm terminal block RND 205-00084, vertical (cable from top), 8 pins, pitch 5mm, size 60x9mm^2.

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