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BackAnother fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative.
- Fairly simple one, using Arduino.
- Power Inductors (https://www.bourns.com/docs/product-datasheets/srp7028a.pdf Shielded Inductors Bourns SMD.