Further, if you hold down the push button the light output will cycle between brightnesses. The whole system can be powered from any 12VDC power source, for instance from an automobile battery. /* * ...

There’s an Arduino coupled with an RTC module to keep the time, which is connected to the two standard hobby servos mounted in the front panel. A UV LED and simple push button round out the rest ...

[Ed] was tasked with adding push-button degaussing to an arcade cabinet ... of transistor-based designs on paper, grabbed a nearby Arduino. [Ed] took off the PTC and soldered in two wires ...