This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer. In my example the whole ...

I have spent at least an hour almost every day since the 80’s advancing my knowledge in electronics. Recently I brushed up my knowledge on LED fading secrets and attained something pleasant. Now, I’d ...

This Arduino project adjusts the LED brightness using two buttons. One button increases the brightness, and the other decreases it, with the value displayed on the serial monitor.

In this experiment, we have an LED controlled by digital pin 13 turn on when the ambient brightness drops below 85 units on the LDR (Light Dependent Resistor). Otherwise, the LED should be turned off.

In a previous article, I discussed LEDs in general and their properties. In this write-up, I want to give some examples of driving LEDs and comparing a few of the most commonly used methods. There is ...