You can use shift register ICs like 74HC595 to connect more leds and free the pins on your Arduino board. The only interesting part inside the code is at line #18 inside the for() loop where we put ...

If we asked you to light up an LED using an Arduino, there’s a good chance you’d know exactly how to do ... Have the knob mounted to Lexan and then a gear drive to connect the Potentiometer.

First, upload the following PWM sketch to your Arduino Uno r3/Nano v3 and connect a 10mm water-clear green LED to D9. const int ledPin = 9; // Test LED wire to D9 void setup() { // Set the pin as a ...