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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 the left sub-panel top_row = height - hole_dist_top); echo("Putting a hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1847631 8A 320V Generic Phoenix Contact connector footprint for: MC_1,5/7-G-5.08; number of pins: 02; pin pitch: 5.08mm; Vertical; 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 (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1755752 12A || order number: 1766699 12A 630V Generic Phoenix Contact connector footprint for: MC_1,5/9-GF-3.81; number of pins: 02; pin pitch: 7.62mm; Angled; threaded flange || order number: 1755587 12A || order number: 1924596 16A (HC Generic Phoenix Contact connector footprint for: MSTB_2,5/3-GF-5,08; number of pins: 06; pin pitch: 5.08mm; Vertical; threaded flange || order number: 1924389 16A (HC Generic Phoenix Contact connector footprint for: MSTBV_2,5/16-GF-5,08; number of pins: 02; pin pitch: 5.08mm; Angled || order number: 1923788 16A (HC Generic Phoenix Contact connector footprint for: MC_1,5/8-GF-3.5; number of pins: 08; pin pitch: 5.08mm; Angled; threaded flange || order number: 1806300 12A 630V Generic Phoenix Contact connector footprint for: MSTB_2,5/12-GF-5,08; number of pins: 10; pin pitch: 3.50mm; Vertical || order number: 1776702 12A || order number: 1843677 8A 160V Generic Phoenix Contact connector footprint for: MC_1,5/4-G-3.5; number of pins: 10; pin pitch: 5.08mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C or ISO 7049-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1755833 12A || order number: 1924619 16A (HC Generic Phoenix Contact connector footprint for: MCV_1,5/5-GF-3.81; number of pins: 06; pin pitch: 5.00mm; Vertical; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x6.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1836341 8A 320V Generic Phoenix Contact connector footprint for: MCV_1,5/15-GF-3.81; number of pins: 07; pin pitch: 5.08mm; Angled; threaded flange .

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