Arduino Relay Board Schematic. This instructable is for connecting your arduino to a 2 channel relay module and using your sketch to control the switches i bought the 2 relay module on ebay for 9 50 to drive a couple of 240v parts a vacuum cleaner and a rotary engraving tool. An intro to relays basically a relay is an electromagnetic switch.
You shouldn t upload new code while your arduino is connected to the relay. Pcb circuit boards prototyping. Let s change the status quo.
This instructable is for connecting your arduino to a 2 channel relay module and using your sketch to control the switches i bought the 2 relay module on ebay for 9 50 to drive a couple of 240v parts a vacuum cleaner and a rotary engraving tool.
Relay module for arduino is one of the most powerful application for arduino as it can be used to control both a c and d c devices by simply controlling the relay by giving 5v. A relay is commonly used to interface a low current circuit to a higher current circuit. Arduino has changed the world of electronics from the ground up. Since the arduino operates at 5v it can t control these higher voltage devices directly but you can use a 5v relay to switch the 120 240v current and use the arduino to control the relay.
