1. How to wire a 5V relay?

Relays switches turn on and off based on a controlling signal from given to the control pin of the relay. With a microcontroller or a sensor, the digital control pin of the relay must be connected to a 5V capable output pin of a microcontroller or any controlling device like a sensor

2. How to use a 5V relay?

Giving 5V at the Relay control pin will close the circuit between N/O and COM, thereby switching on anything connected between the N/O and COM. At the same time, it will open the circuit between N/C and COM, thereby cutting off the circuit connected via the N/C port. Giving 0V or GND to the relay pin will do the vice versa

3. How to test a 5V relay?

If the relay switches at its designed actuation voltage, then the could be inferred to be working. You can easily make sure of this, by hooking up a multimeter at the relay terminals and observing the voltage before and after the switching action

4. How to trigger a 5V relay?

A 5V relay is triggered using a 5V signal given to its control pin. Any voltage below 5V would switch off the relay and anything more than 5V can potentially damage the relay

5. How much current does a 5V relay draw?

A nominal current consumption of a 5V relay is typically around 70mA, although it will vary between models. Please the check the relay specific datasheet to know the exact value

6. What is the use of a relay module?

Relay is an electrically controlled electronic on electro mechanic switch. Adding a relay will give the device the ability to control switching actions based on different intrinsic parameters

7. Where can I find a 5V relay online?

5V relays can be obtained from almost all online stores including Robocraze. The 5V relay module price on Robocraze is comparatively less among similar websites.

8. Where can I find a 5V relay nearby at a physical store?

5V relays are available in most electronic stores. One can easily buy Relay from Robocraze by choosing the store pick-up option.

9. What are 5 V relay modules used for?

A 5 V relay module acts like a remote-controlled switch. It uses a small low-voltage signal (5 V) to control a separate circuit that may have a much higher voltage or current. For example, you might use your microcontroller to send a 5 V signal to the relay module, and the relay would then turn on or off a 230 V AC light, a 12 V motor, or some other heavy-load device. Because the relay physically separates (â€œisolatesâ€) the control side from the load side, it helps protect your electronics while enabling you to switch bigger loads safely.

10. How many channels do these 5 V relays support?

The number of channels varies by module. Some boards are a â€œsingle-channelâ€ relay (just one relay switch), others offer 2, 4, 8, 10 channels or more. For example: a 10-channel 5 V relay board is offered for use with microcontrollers. So when selecting a relay module, check how many independent relay switches (channels) the board includes â€” more channels = more loads you can switch independently.

11. Can these relay modules be used with Arduino and Raspberry Pi?

Yes, in general you can use 5 V relay modules with both Arduino and Raspberry Pi, but with a few important caveats.With Arduino: Because most Arduino boards operate at 5 V logic, connecting a 5 V relay is straightforward: you power the module with 5 V, and an Arduino I/O pin triggers the relay.With Raspberry Pi: Because many Pi GPIO pins operate at 3.3 V logic (and are not 5 V tolerant), you must ensure your relay module is compatible (for instance, uses an opto-isolator or has a level shifter) or provide proper interface.Always check the module’s trigger voltage (what the “IN” pin expects), the power supply for the relay coil (the board usually needs a solid 5 V supply), and whether there is isolation or safe interfacing for the microcontroller’s logic side.In short: yes you can, but check compatibility with your board, power supply, and how many loads you’re switching.

12. Are these relay modules pre-assembled and ready to use?

Yes, 5V relay modules work with Arduino directly. For Raspberry Pi (3.3V GPIO), use opto-isolated relay modules or level shifters to ensure compatibility. Always verify the module's trigger voltage, power supply requirements, and whether it has isolation protection. Check your specific board's voltage specifications before purchasing to avoid damage to your microcontroller.

5V Relay Modules for Arduino, Raspberry Pi & DIY Projects

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Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
Unit price: per

Example product title

Rs. 20; Rs. 20
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Item Name	Price
5V Relay Cube	17
5V 1 Channel made in INDIA - GL Make	36
5V 30A 1-Channel Relay Module	181
Waveshare Modbus RTU 8-channel Relay Module RS485	2599
DC 6V To 30V One Way Relay Module	279
NE555 Pulse Frequency Duty Cycle Adjustable Module	77
SLA 5V DC 4Pin 30A Power Relay	49
NE555 5V Delay Timer	67
5V 16 Channel Relay Module	625
8 Channel 5V Relay Board	247
4-Channel 5V Relay Board	130
2-Ch 5V relay Board	69
1CH 5v Optocoupler Relay Board	62
1 CH 5V Relay Board	49

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Frequently Asked Questions

1. How to wire a 5V relay?

Relays switches turn on and off based on a controlling signal from given to the control pin of the relay.

With a microcontroller or a sensor, the digital control pin of the relay must be connected to a 5V capable output pin of a microcontroller or any controlling device like a sensor

2. How to use a 5V relay?

3. How to test a 5V relay?

If the relay switches at its designed actuation voltage, then the could be inferred to be working. You can easily make sure of this, by hooking up a multimeter at the relay terminals and observing the voltage before and after the switching action

4. How to trigger a 5V relay?

A 5V relay is triggered using a 5V signal given to its control pin. Any voltage below 5V would switch off the relay and anything more than 5V can potentially damage the relay

5. How much current does a 5V relay draw?

A nominal current consumption of a 5V relay is typically around 70mA, although it will vary between models. Please the check the relay specific datasheet to know the exact value

6. What is the use of a relay module?

Relay is an electrically controlled electronic on electro mechanic switch. Adding a relay will give the device the ability to control switching actions based on different intrinsic parameters

7. Where can I find a 5V relay online?

5V relays can be obtained from almost all online stores including Robocraze. The 5V relay module price on Robocraze is comparatively less among similar websites.

8. Where can I find a 5V relay nearby at a physical store?

5V relays are available in most electronic stores. One can easily buy Relay from Robocraze by choosing the store pick-up option.

9. What are 5 V relay modules used for?

10. How many channels do these 5 V relays support?

11. Can these relay modules be used with Arduino and Raspberry Pi?

Yes, in general you can use 5 V relay modules with both Arduino and Raspberry Pi, but with a few important caveats.With Arduino: Because most Arduino boards operate at 5 V logic, connecting a 5 V relay is straightforward: you power the module with 5 V, and an Arduino I/O pin triggers the relay.

With Raspberry Pi: Because many Pi GPIO pins operate at 3.3 V logic (and are not 5 V tolerant), you must ensure your relay module is compatible (for instance, uses an opto-isolator or has a level shifter) or provide proper interface.

Always check the module’s trigger voltage (what the “IN” pin expects), the power supply for the relay coil (the board usually needs a solid 5 V supply), and whether there is isolation or safe interfacing for the microcontroller’s logic side.

In short: yes you can, but check compatibility with your board, power supply, and how many loads you’re switching.

12. Are these relay modules pre-assembled and ready to use?

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