[rcheshire (Rowland)]

This is the latest update to the electronics. I noticed some very fine switching lines in images not present in the prototype, which had large copper planes on all the pwm pins and mosfet gates

Scaling down to fit the battery grip seems to have reintroduced interference. To be doubly sure, I added a decoupling capacitor and a pull down resistor to the mosfet gates (1nf, 1M) as well as a decoupling capacitor to each microprocessor pwm pin, which in the prototype wasn't required - no more lines. This was all tested with a circuit simulator and bread board, and seems fairly close to the simulation.

EDIT: added a 3D IDF created using simplifiedsolutions online program. Not exact but close. Had go with closest size match on a few parts here and there. The top right "I" shaped protrusion is snapped off and mounted perpendicular to the main board to connect camera power.

Added the schematic - sorry, it's not up to professional standards.