TT046 Stubbs Solenoid Driver

Small enclosure (1590G) with M0 and two toppers: one with 2 pushbutton switches, and one with an NFET for driving a solenoid.

The solenoid runs on 5V, so we use a 5V desktop switcher to run the box, and run directly from the power supply to the NFET topper (yellow wire).  We also short out the 5V switching regulator (red wire)

I made two of these, with two slightly different revs of TipTop1590G, so here are the two markups of sheet 1, and the markup of sheet 2:

ToprNFET2 is a simple NFET driver:

Add PDF for switch topper here:

Here's the arduino code: