Overview:

I store my tractor in one half of my workshop and keep the door opener attached to it. Unfortunately, one day when I was mowing a field, the opener got knocked off by some hanging branches, and I didn’t notice it was gone until I got back and couldn’t open the door.  I scoured the field and found nothing but shards. Apparently, it was run over by the mower.  By some miracle however, the circuit board was unscathed and still working.

I designed a custom case and some buttons.  I also modeled the circuit board to ensure a tight fit.  The top and bottom of the case snap together and can be pried apart to change the battery.  It works great.  My only regret is I didn’t take the time to incorporate something to hang it, mount it or somehow attach it securely to the tractor.  That will be a future upgrade.

This circuit board was for a Chamberlain Lift Master, but I’ve included my Fusion 360 file, so you can customize it for your needs.  Start by updating the geometry of the circuit board.