Push button, ground out pin ... A bunch of hot glue fixes this. The LCD is secured similarly. I generally power my Arduino projects from a shield. It lets me avoid wasting power through the ...

[Tobie’s] part of the hack is to use an Arduino and a few buttons as the controller. It’s easy to set up and we think the breadboarded controller approximates the size and weight of an LCD ...

Control is via an Arduino Nano, with a few push buttons and a 16 x 2 LCD display for user feedback. Often, completing a first build will reveal all manner of limitations and drawbacks of a design.