@stan2004 posted:Only 2 FET outputs?!
How about 4 FET outputs!
If I were building a custom board, then I'd have four. However, I have an existing board that already knows how to read the stripes on the flywheel, so I figured the path of least resistance would be to "repurpose" that board. Obviously, a new layout could have four FET's, I wouldn't need my cal jumper or the indicator LED that I use to prompt calibration and tape testing.
With the Arduino Nano, you could drive separate LED's from outputs, you have a ton of outputs to use. That way you could have one LED for each output and not exceed limits. However, I don't know about total power dissipation, never tried to drive a ton of stuff from the Arduino, especially the Nano with the smaller footprint uP.
