synth_tools

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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 a medium customarily used for hall sensors, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf TO-92 leads in-line, wide, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf.

Fireball/Fireball_panel.kicad_pro Latest commits for.
3.0mm, 2 pins LED, diameter 3.0mm 2.
See https://standexelectronics.com/de/produkte/ms-reed-relais/ Standex Meder MS SIL.
That would be likely.

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