Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, ... /* * Arduino 4x7 LED Display * Displays numbers ranging from 0 through 1023 * Test Code displays the value of a sensor ...

We’d seen it done with buttons, switches, gestures, capacitive touch, and IR remote, but never like this. [electron_plumber] made an LED that can be blown out like a candle, and amazingly it … ...

Instead of using mechanical paddles, [Sebastian] brought his iambic key into the 21st century by using a touch sensor. An ATtiny45 measures the time it takes for a single metal plate to fully charge.