Arduino relay hookup

arduino relay hookup

How to connect a relay module to an Arduino?

The connections between the relay module and the Arduino are really simple: GND: goes to ground; IN1: controls the first relay (it will be connected to an Arduino digital pin) IN2: controls the second relay (it should be connected to an Arduino digital pin if you are using this second relay. Otherwise, you don’t need to connect it)

How many pins are there in an Arduino relay?

It is very popular relay among Arduino and DIY electronics hobbyists. This relay has 5 pins. 2 for the coil. Middle one is COM (common) and the rest of the two are called NO (Normally Open) and NC (Normally Close).

What is the pinout of the relay module?

Relay Pinout. The following figure shows the relay module pinout. The six pins on the left side of the relay module connect high voltage, and the pins on the right side connect the component that requires low voltage—the Arduino pins.

How to connect a relay to a circuit board?

To interface the relay, its best to use the negative side of the load and connect it to the relay Normally Open pin in series... Then the common ground of the relay is then connected to the ground line of your connection

How do I power the relay module on an Arduino?

In this approach, you use the Arduino board itself to power the relay module by connecting the boards 5v outgoing pin and and one of the ground pins to the corresponding pins on the relay module as in the diagram above (ignore the gnd/vcc/jd-vcc section in this setup).

What is the pinout of the relay module?

Relay Pinout. The following figure shows the relay module pinout. The six pins on the left side of the relay module connect high voltage, and the pins on the right side connect the component that requires low voltage—the Arduino pins.

What are the 5V relays in Arduino?

Relay Module 5V. LDR Sensor. Jumper Wires. Bulb. A relay is an electric switch that can be turned on or off. Relays are used to control a circuit by a separate low power signal or, controlled several circuits by one signal. GND:- It connects to the ground pin of Arduino. IN1:- It connects to the digital pin of Arduino to control the first relay.

How does Arduino control a high voltage device?

Arduino controls a high voltage device by controlling a relay. Controlling a relay is simple. We just need: Connect an Arduinos pin to the IN pin of the relay. Control the relay by programming the pin to LOW or HIGH.

How to connect a relay to the PCB?

Another step for connecting a relay to the PCB covers the pin terminals and configuration of the relay. The standardized approach shown in the table identifies the terminals of electromagnetic relays. Connects to device that the relay will power when the coil receives sufficient voltage to energize.

How to wire a relay?

How To Wire A Relay. A relay is switched by electrical power and not a human. This is done by energizing a coil which is internal to the relay and by energizing the coil, the relay changes state just like a wall switch would. Therefore when you energize a relay, you are switching circuits off and on.

What are the switch connections of a relay?

The relay’s switch connections are usually labeled COM (POLE), NC and NO: COM/POLE= Common, NC and NO always connect to this, it is the moving part of the switch.

Where do I connect the com/pole to in a relay?

COM/POLE is always connected to NC (Normally connected) pin. As current is passed through the coil A, B, the pole gets connected to NO (Normally Open) pin of the relay. First of all try the following circuit.

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