[rcheshire (Rowland)]

Here is the populated board - hand drilled - with some learning about component spacing.

I abandoned the idea of dual mosfets for now to simplify things.

This will run sensor cooling, sensor defogging and lens dew heater. A second board will drive the camera shutter and dithering and perhaps camera power - for now it's batteries.

A little more design work on the pcb , a little bit of code to drive the heater supplies at the right time.

EDIT: Amazing!!! - found an error in the board. Disturbingly, it was the digital ground to the Teensy +5. Anyway all fixed - cut the trace and use a jumper to the correct pin.