What is 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. 5V relay signal input voltage range, 0-5V.
How does a 5V relay module work?
HOW THE 5V RELAY WORKS. The SRD-05VDC-SL-C relay has three high voltage terminals (NC, C, and NO) which connect to the device you want to control. The other side has three low voltage pins (Ground, Vcc, and Signal) which connect to the Arduino. Inside the relay is a 120-240V switch that’s connected to an electromagnet.
What is 5V 2 channel relay module?
This module contians two relays that are electrically isolated from the controlling input. The relays can be used to switch higher voltage and current loads than a microcontroller can traditionally accomplish.
What is the purpose of a 5V relay?
The advantage of using a 5V relay in this project is that the power supply for the relay can be directly given from the Arduino UNO board itself. Let us now see some basics of a relay. A relay is a type of a switch that acts as an interface between microcontrollers and AC Loads.
What is the working principle of relay?
It works on the principle of an electromagnetic attraction. When the circuit of the relay senses the fault current, it energises the electromagnetic field which produces the temporary magnetic field. This magnetic field moves the relay armature for opening or closing the connections.
What are the components of a 5V relay module?
Following are the major components present on the four-channel relay module, we will get into the details of this later in the article. 5V relay, terminal blocks, male headers, transistors, optocouplers, diodes, and LEDs. Single-channel relay module, dual-channel relay module, eight-channel relay module. SCRs, TRIACs, Solid State Relay module.
What are the pins in a single channel relay module?
It is known as a single channel because only one relay is used and it operates on 5V. Relay module consists of six pins such as normally open pin , normally closed, common , signal, Vcc and ground pins. Signal Pin : It is used to control the relay. This pin can be active low or active high.
What does a 5V DC signal do to a relay?
Because the relay operates at 5V DC. In other words, a 5V active high or low signal activates the relay by energizing its coil. As mentioned earlier, internally a 5V relay consists of a NC, NO, COM terminals and a coil.
What are the pins on a ky-019 5V relay?
The KY-019 consist of a 1MΩ resistor, a LED, a 1N4007 rectifier diode and a 5VDC relay capable of handling up to 250VAC and 10A. On the DC side of the board there are 3 pins for signal, power and ground. On the AC side there are 3 contacts, NC (Normally Closed), Common and NO (Normally Open).