In this project we use a popular JavaScript framework Node.js to control the LED connected to Arduino Uno. We will also use Node.js to control the brightness of LED from a webpage using Arduino.

In this Arduino HM10 BLE tutorial, we will interface HM-10 BLE Module with Arduino Uno to control an LED wirelessly using Bluetooth protocol. The On/Off commands will be sent by Smartphone.

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.