Projects, notes, etc by Will O’Brien


Date: September 21st, 2009

Arduino sine wave with a digital potentiometer

21 September, 2009 (07:18) | Uncategorized | 2 comments

I wanted to create a sine wave to test my ignition system with a better test signal, but I didn’t have a DAC handy. I did have a spare digital pot from my RGB doorlock project. There are several examples of DACs being built from resistor ladders, so I figured I’d give it a shot. [...]