I always regret going down the perf board route. Too many flywire’s and last minute bodge jobs. But since this project is on a timeline, I don’t have much of an option. The circuit hasn’t changed from the last picture, but now includes an ATTINY1616 to tickle the various control lines. See my first project log for the circuit.

I decided to first sketch the circuit out to roughly floor plan the parts & wiring. The final result looks a bit like the ramblings of a madman, but thanks to the floor planning there were no major miswirings or debugging required.

And here’s what that looks like in reality…

I quickly ran into an issue with the ADC leakage current. The leakage current from VBAT to PB3 through the 1Meg resistor, pulled the measured signal down to the almost nothing. In the future design I’ll include a buffer to resolve this issue… but for this perf board version I might just ignore the feature. TBD.