The two wires from the puzzle container go to an Arduino UNO which uses an ILI9325 touch panel TFT display for both the start, stop, and reset buttons, and to show the time elapsed.

These days, you could be forgiven for thinking driving an LCD from a microcontroller is easy. Cheap displays have proliferated, ready to go on breakout boards with controllers already baked in. Loa… ...

Anders has introduced a family of rotary switches that have a circular colour TFT-LCD in the middle, as well as a push button function. Available with 1.3, 2.1 or 2.47inch circular displays, the knobs ...