[Ed] was tasked with adding push-button degaussing to an arcade cabinet’s CRT console. The display can be rotated ... grabbed a nearby Arduino. [Ed] took off the PTC and soldered in two ...

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.

Here, a common cathode 7-segment LED display is connected to Arduino for displaying the digits. The code (Arduino sketch) allows push button increment of the counter from 0 to 9. The whole circuit can ...