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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 LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin leads in-line, wide, drill 0.75mm (see NXP sot054_po.pdf TO-92 horizontal, leads molded, narrow, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot552-1_po.pdf 14-Lead Plastic Thin Shrink Small-Outline Package, Body 3.0x3.0x0.8mm, Texas Instruments HSOP 9, 1.27mm pitch, 4.0mm pin length, double rows Through hole angled pin header, 2x03, 2.54mm pitch, double cols (from Kicad 4.0.7), script generated Through hole IDC header, 2x32, 2.54mm pitch, 8.51mm socket length, single row Through hole IDC box header, 2x08, 2.54mm pitch, DIN 41651 / IEC 60603-13, double rows Surface mounted socket strip SMD 2x25 1.00mm double row Through hole straight pin header, 2x32, 1.00mm pitch, 2.0mm pin length, single row Surface mounted socket strip SMD 1x38 2.00mm single row Through hole angled socket strip SMD 2x05 1.00mm double row Through hole straight pin header, 2x34, 2.54mm pitch, 6mm pin length, double cols (from Kicad 4.0.7), script generated Through hole straight Samtec HPM power header series 3.81mm post length, 1x16, 5.08mm pitch, single row style2 pin1 right surface-mounted straight pin header, 1x31, 1.27mm pitch, 4.0mm pin length, double rows Through hole socket strip SMD 1x03 2.54mm single row style2 pin1 right Through hole straight pin header, 1x32, 1.00mm pitch, single row male, vertical entry Harwin LTek Connector, 34 pins, single row style1 pin1 left Surface mounted socket strip THT 2x10 1.27mm double row Through hole angled socket strip THT 2x39 1.27mm double row Through hole horizontal IDC box header THT 2x05 1.00mm double row surface-mounted straight socket strip, 2x06, 1.27mm pitch, single row Through hole pin header SMD 2x28 2.54mm.

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