The V0 (also labelled as VEE) connection is for contrast control, and a potentiometer ... in a 16×2 LCD via software with an Arduino, controlling the backlight turned on for certain time (which saves ...

[Christian] wrote in to tell us about his third-generation Arduino MIDI sequencer ... include the slider and potentiometer band, as well as the repository of buttons mounted below that.

as potential buttons. Curiosity! Excellent. Not-well-secured LEDs - not excellent. A bunch of hot glue fixes this. The LCD is secured similarly. I generally power my Arduino projects from a shield.

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 ...