1 Channel Relay Board Circuit Diagram

A relay is an electrically operated switch that you can use to control mains voltage appliances.

1 channel relay board circuit diagram. In the above circuit 5v relay is powered by a 9v battery. Learn how to use relay with arduino how relay works how to connect relay to arduino how to code for relay how to program arduino step by step. Now we need to collect some parts that we needed to make the diy relay module. An on off switch is added for the switching purpose of the relay.

Although the circuit diagram explains the detailed connections practically we didn t need to make all the connections. Most of the parts was lying around my home i used to save little more here the list of all the parts you needed to do this project. When a pin is high the relay is off. Meaning the current is flowing unless you send a signal from the arduino to the relay module to open the circuit and stop the.

At the initial condition when switch is open no current flow through coil hence common port of relay is connected to no normally open pin so the. Most relay modules whether 5v or 12v will come with the aforementioned connection and hence all you need is to give power supply to the relay module i e. This post shows how to use a relay module with an arduino board. Before we proceed with the circuit to drive the relay we have to consider two important parameter of the relay.

Circuit diagram and working. In the nand circuit shown in figure 1 10 if the coil voltage of any relay is disconnected current will flow through the normally closed contact. In the or circuit shown in figure 1 11 one of the relays to which the inputs a b c are connected ensures that the bobbin s energy is lit by the output lamp that is the output is logic 1. Would the 1 channel 5v relay do the trick as well.

Finally the last main component of the circuit is the actual relays. Let us learn how to use one in our circuits based on the requirement of our project. How to use a relay. 5v and gnd and connect the control signal from arduino to control.

Since an inductor the relay coil cannot change it s current instantly the flyback diode provides a path for the current when the coil is switched off. Each relay is individually controlled by a pin coming from the shift register. In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor. Below given is relay driver circuit to build your own relay module.

I m using this 8 channel relay board to control each of my sprinkler zones. In dc control circuits should have a flyback diode connected in parallel to the coil of the relay eg 1n4001 but check the relay data sheet for choosing the right diode. 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. Relays are most commonly used switching device in electronics.

The way the board is wired. 5 volt relay i used 6 volt because i need 6 volt relay 2.