Integrated circuits, chipsets, ... and just a single LEDs on pin 13. ... (arduino uno) or a atmega2560 (arduino mega) in the Arduino IDE was hit or miss, ...

Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, followed by the Arduino sketch. Carefully follow the hookup diagram to complete your hardware,and then upload the sketch to ...

PWM pins work the same way across all Arduino boards, so you don't need to go out of your way to buy a Mega if you already have a board supporting PWM. On the Uno, Nano, and Mini, the PWM pins are ...