My idea for manually setting a 16bit number using two potentiometers worked technically, but was not the brilliant method I had vaingloriously imagined 🙁 Not in summary, read on…. Note: scroll down ...

I cannot get over how easy it is to get code running on an Arduino, allowing me to write the code to try to connect to a 20 character x 4 line LCD (wearing an I2C-to-parallel ‘backpack). Update: Part3 ...