What is the use of 8 channel relay module?

Introduction. This is a 8-channel LOW level trigger relay and it can be applied to Arduino and Raspberry Pi. Relays are suitable for driving high power electronic devices such as lights, electric fans and air condition. A relay can be used to control high voltages with a low voltage by connecting it to an MCU.

What is a 8 channel relay board?

8 Channel Relay Board is a simple and convenient way to interface 8 relays for switching application in your project. Input voltage level support TTL as well as CMOS. Easy interface with Microcontrollers based projects and analog circuits.

What is channel 5V relay module?

2-Channel 5V Relay Module is a relay interface board, it can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM and so on. It uses a low level triggered control signal (3.3-5VDC) to control the relay. Triggering the relay operates the normally open or normally closed contacts.

Why relay module is used?

The relay module is an electrically operated switch that can be turned on or off deciding to let current flow through or not. They are designed to be controlled with low voltages like 3.3V like the ESP32, ESP8266, etc, or 5V like your Arduino.

What is the function of relay module?

Relay Modules A power relay module is an electrical switch that is operated by an electromagnet. The electromagnet is activated by a separate low-power signal from a micro controller. When activated, the electromagnet pulls to either open or close an electrical circuit.

How do I connect 8 relay modules to Arduino?

  1. Remove blue jumper.
  2. Connect JD-VCC and GND from the Relay Module to a Separate 5VDC Supply (1Amp or greater)
  3. Connect VCC from the Relay Module to 5V on your Arduino.
  4. Connect required control signals as shown.
  5. Note: DO NOT connect GND from the Relay Module to your Arduino.

How do I create a 5V relay module?

first download the relay. ino file then open with your Arduino. connect the Vcc and GND pins of the relay module to the Arduino’s 5 volt pin and gnd pin. then connect the relays input pin(the pin comes from the transistor’s base pin) to the Arduino’s digital pin 13.

How does a 5V relay module work?

A 5v relay is an automatic switch that is commonly used in an automatic control circuit and to control a high-current using a low-current signal. The input voltage of the relay signal ranges from 0 to 5V.

What is the difference between relay and relay module?

Essentially, they work as switches. Your average relay module comprises two internal metal contacts. Usually, these contacts do not connect or touch each other. However, relays include an internal switch connecting these contacts to complete an electrical circuit that allows current flow.

How many relays can an Arduino control?

Each IO Expander can control up to 16 daisy chained Relay Expanders for a total of 256 relays. Then connecting 255 IO Expanders together you can selectively control up to 65,280 relays.