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A circuit outside the 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 the number of pins: 12; pin pitch: 5.08mm; Vertical; threaded flange || order number: 1776922 12A || order number: 1755529 12A || order number: 1830729 8A 160V Generic Phoenix Contact connector footprint for: MC_1,5/16-GF-3.81; number of pins: 14; pin pitch: 5.00mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1924499 16A (HC Generic Phoenix Contact connector footprint for: MC_1,5/4-G-3.5; number of pins: 06; pin pitch: 5.00mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C or ISO 7049-ST 2.2x4.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C or ISO 7049-ST 2.2x6.5 C or ISO 7049-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1776896 12A || order number: 1924509 16A (HC Generic Phoenix Contact connector footprint for: MC_1,5/11-G-3.81; number of pins: 08; pin pitch: 3.81mm; Angled; threaded flange || order number: 1843790 8A 160V Generic Phoenix Contact connector footprint for: MSTB_2,5/8-GF-5,08; number of pins: 10; pin pitch: 7.50mm; Angled || order number: 1757543 12A || order number: 1803280 8A 160V Generic Phoenix Contact connector footprint for: MSTBA_2,5/6-G; number of pins: 02; pin pitch: 5.00mm; Angled; threaded flange; footprint includes mount hole.

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