A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open ...

Rotary encoder pinout and wiring Most RTs also has built in ‘push-on’ momentary switch, usually one side has 3-pins (two coding pins and one common/ground pin) and the other side has 2-pins (N/O ...

Posted in Arduino Hacks, how-to Tagged arduino, interrupt, tutorial ← Panning Time-lapse Rig Making An RF Controlled Light Switch Work With IR → ...

Of course, it can switch faster than a mechanical switch and is easy to control, so — as always — its a tradeoff. Notice, too, that the mux chip can operate rail-to-rail.