Low input impedance of ATtinys

According to the datasheet, an ATtiny has an input impedance of 10kΩ or less for a pin configured as input. If this value also is used for the ADC, my voltage divisor has a much too high resistance for an accurate measurement.

We’ll see how this affects measurement as soon as the boards are back from OSHPark.

Hopefully everything can be configured to match my needs.