A relay is basically a switch which is operated electrically by electromagnet.
Arduino 5v relay module circuit diagram.
The working of this circuit is very simple.
The arduino can be programmed to turn on the relay when a certain event occurs for example when the temperature of a thermistor gets higher than 30 c.
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.
To control the relay you.
Let us discuss the working of the project.
In this arduino relay control circuit we have used arduino to control the relay.
The working of the project is based on the functioning of the relay and the ability of arduino to control the relay.
A relay can be used to control high voltage electronic devices such as motors and as well as low voltage electronic devices such as a light.
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.
So connect the 5v and the ground of the arduino with the 5v and the ground of the relay module.
This post shows how to use a relay module with an arduino board.
Now we need to test the circuit diagram of the relay module on a breadboard.
In this example we will connect the relay module with arduino in the normally open state.
After all parts you collected lets go ahead to the next step.
Whenever the hall effect sensor is subjected to a magnetic field it toggles the relay as per the code.
To power the relay module you need to supply 5v in the vin pin of the relay board.
A simple project in which arduino uno controls a 5v relay is explained here.
The connections for connecting the relay module with arduino are very simple.
Circuit diagram and working.
Don t skip this step it is necessary to avoid mistakes when soldering into a pcb and check if it is works.
Arduino ky 019 relay module is used to control ac circuits the relay acts as a switch that responds to a signal received from the arduino it has an integrated led that indicates if the signal is high or low.
Here we have used 6v relay module.
Assemble all the parts as shown in the schematic diagram.
Now we have all the parts to make a diy relay module.
A relay is an electrically operated switch that you can use to control mains voltage appliances.
As mentioned earlier by interfacing arduino with 5v relay module we intend to operate an ac load like lamp.
The circuit diagram for controlling a 5v relay module with hall effect sensor and arduino is shown below.
Light intensity below 500 then the relay module gets input from arduino through pin 9 and there is a connection between the com and no pin is established and turns on the light.
Commonly used in iot projects to control lights and other electronic appliances.
Circuit diagram for relay with arduino code for relay with arduino the working of the above sketch is as when the ldr senses darkness i e.
