Minimal Arduino using through-hole parts

brdfront brdback

It’s still hovering around freezing, so I guess it’s time for another Arduino.

I got curious about how small I could make yesterday’s Arduino Pro Mini using through hole parts if I got rid of everything optional. And here’s the answer.

I got the board down to the width of the original Arduino Pro Mini: 0.6″. I wasn’t able to shrink the length any; it’s still 1.8″. It doesn’t have an on-board power supply, there are no LEDs, and no optional pullups for I2C/Wire. Totally minimal, baby. You can see for yourself in the schematic.*

As with yesterday’s offering, a PCB is available through OSH Park.

*Subject to change!

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