Web Controlled Relay Arduino
A relay is a programmable electrical switch which can be controlled by arduino or any micro controller.
Web controlled relay arduino. This project is a simplified version of one of my projects in the arduino step by step projects. It is used to programmatically control on off the devices which use the high voltage and or high current. When you upload the the code provided in. Arduino webserver control lights relays servos etc.
Here to turn on the relay with arduino we just need to make that arduino pin high a0 in our case where relay module is connected. Circuit diagram and working. How does the circuit works. Now you can use this project to control any electronics appliance you want.
It is a bridge between arduino and high voltage devices. Arduino control relay schematic. With this project you built an arduino web server that turns a relay on and off. I ll be controlling one led and a servo but you can apply this method to control a dc motors buzzers relays stepper motors etc.
In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor. This voltage is used to drive the transistor that will switch on the relay and the load in our case the fan will be powered from the main power supply.