Arduino Relay Module Pinout

Then connect the signal pin of the relay module with the pin 12 of the arduino.

Arduino relay module pinout. 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. In this configuration the relay is always closed and remains closed until you send a signal from the arduino to the relay module to open the circuit. 3 3v 1 channel relay module. 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.

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. The relay module allows you to use a separate power supply to drive the relay coils. In pin is used to control the relay. It is an active low pin meaning the relay will be activated when you pull the pin low and it.

Let s have a look at the pinout of one channel relay module. The detail instruction code wiring diagram video tutorial line by line code explanation are provided to help you quickly get started with arduino. In our last two posts we focused on the software aspects of the arduino. The connections for connecting the relay module with arduino are very simple.

The arduino can be programmed to turn on the 4 channel relay module when a certain event occurs for example when the temperature of a thermistor gets higher than 30 c. Jd vcc 5vdc 200ma external power supply relay coils vcc versus jd vcc. An arduino digital i o pin can drive 40ma max and around 20ma nominal. Learn to interface one channel relay module with arduino along with relay working hardware overview pinout wiring and arduino code.

Working is simple we need to make the relay pin pin a0 high to make the relay module on and make the relay pin low to turn off the relay module the ac light will also turn on and off according to relay. Almost any sensor can be used to trigger the relay to turn on or off. So connect the 5v and the ground of the arduino with the 5v and the ground of the relay module. We saw that arduino boards are programmed using a language derived from c and c in arduino s integrated development environment ide and learned a few basic debugging methods in this post we ll be taking a closer look at the arduino hardware and more specifically the arduino uno pinout.

A relay coil requires 20ma to open. We just programmed the arduino to make the relay pin a0 high and low with a delay of 1 second. The following figure shows the relay module pinout. Optocouplers are in use to isolate the arduino output pins from the.

Or when the resistance of a photoresistor drops below 400 ohms. A normally open configuration works the other way in which the relay is always open until you send a signal from the arduino to the relay module to close the circuit.