Contents
What does a 4 channel relay module do?
The 4 Channel Relay Module is a convenient board which can be used to control high voltage, high current load such as motor, solenoid valves, lamps and AC load. It is designed to interface with microcontroller such as Arduino, PIC and etc.
How do you build a 4 channel relay board?
4 Channel Relay Board
- Input supply 12 VDC @ 170 mA.
- Output four SPDT relay.
- Relay specification 5 A @ 230 VAC.
- Trigger level 2 ~ 5 VDC.
- Berg pins for connecting power and trigger voltage.
- LED on each channel indicates relay status.
- Power Battery Terminal (PBT) for easy relay output and aux power connection.
How to control 5V 4 Channel relay module?
A LOW signal closes the switch and allows current to flow from the C terminal to the NC terminal. Therefore, if you want the HIGH signal to turn OFF the 120-240V current, use the normally closed terminal: Connecting the 5V 4-channel relay module with Arduino. Code for controlling 4 channel relay module.
What are the benefits of latching relay modules?
The LR4 module uses latching relays that provide the following benefits: •Low power consumption Once the control module changes the state of the relay by applying power to a coil, power can then be removed as the relay mechanically latches its state.
When does Arduino turn on 4 Channel relay?
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. Or when the resistance of a photoresistor drops below 400 Ohms. Almost any sensor can be used to trigger the relay to turn on or off.
What are the different types of relays on the LR4?
There are two different contact types on the LR4. One type is referred to as a Form A and the second is referred to as a Form C. Relays #1 and #2 are type Form A and Relays #3 and #4 are type Form C. The following figures outline the differences: