Touch sensor — cycle LEDs

What do we want to do?

Recognize individual touches and remember the selected state.

Parts

• Arduino Uno + USB cable, breadboard, and jumper wires.
• Active-HIGH touch module
• 3 LEDs and 3 × 330Ω resistors

What to expect

Each new touch advances one LED: 1 → 2 → 3 → 1. Holding a touch does not keep advancing.