OMRON H3Y-2 Time Delay Relay 0-5 Seconds 24V DC 5A 250VAC Resistorive Timer Relay

Description

What it is

The OMRON H3Y-2 is a time delay relay that allows controlling electrical circuits with a programmable delay time between 0 and 5 seconds.

Features

• Delay time: 0-5 seconds
• Supply voltage: 24V DC
• Switching current: 5A
• Switching voltage: 250VAC resistive

What it is for

This relay is ideal for applications that require a simple timer, such as turning on and off a device after a predefined time interval. It can be used with Arduino or other microcontrollers to create timers, automatic control systems, and other applications.

Tutorial: How to use OMRON H3Y-2 0-5 second time relay

The OMRON H3Y-2 relay is ideal for controlling electrical devices that require timing. Useful for beginner and intermediate makers.

What you need

• OMRON H3Y-2 Relay
• Arduino
• 1kΩ Resistor
• 24V DC power cable
• 24V DC power supply

Steps

1. 1. Connect the relay to the Arduino circuit. See connection diagram.
2. 2. Connect the VCC pin of the relay to 24V DC.
3. 3. Connect the COM pin of the relay to the device to be controlled.
4. 4. Connect the NO pin of the relay to the pin on Arduino.
5. 5. Connect the NC pin of the relay to ground.
6. 6. Connect the GND pin of the relay to ground.
7. 7. Connect a 1kΩ resistor between the NO pin and GND for protection.
8. 8. Load the Arduino code to control the relay.

Example code

void setup() { 
  pinMode(2, OUTPUT); 
} 

void loop() { 
  digitalWrite(2, HIGH); 
  delay(3000); 
  digitalWrite(2, LOW); 
}

Mini project

Create a timer to turn on and off a lamp. Connect the lamp to the NO relay and control it with an Arduino sketch.

Common mistakes

• Do not verify the supply voltage on the datasheet.
• Connect the relay directly to the microcontroller without a protection resistor.
• Forget to connect the GND pin of the relay to ground.
• Set the timing period too long or too short.

Recommended accessories

• Arduino UNO
• 12W lamp
• 24V DC power cable
• OMRON H3Y-2 relay datasheet

Frequently asked questions

How can I verify the relay’s functionality?
Connect a lamp to the relay and check if it turns on when the relay is activated.

Can I use a different power supply than 24V DC?
Check the datasheet to see if the relay supports different voltages.

Does the relay support precise timing?
The relay has a timing range of 0-5 seconds, but the precision may vary.

Can I use this relay with an Arduino from another series?
The relay is compatible with Arduino UNO and similar models.