What is Relay in Electronics ? A relay is an electromagnetic switch operated by a small electric current that can turn on or off a much larger electric current.Relays was invented in 1835 by American electromagnetism pioneer Joseph Henry in
What is Serial Communication ? Serial Communication is based on Serial 8bit data transfer or data transmission vice-versa Rx & Tx . Rx said to Receiver and Tx said to Transmission. USART (Universal Synchronous Asynchronous Receiver) located in Arduino Board. It
Basic Arduino Coding Pins in Arduino Digital I/O Pins { LED to Blink } Analog (Potentiometer) { Reading Temperature } PWM (Pulse Width Modulation) { Control Brightness, Speed } How To Used Digital I/O pins DECLARE PIN ARE USED int pinnumber =