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๐Ÿ’ก high-quality power relay module for raspberry pi 4 3 2 model b b+ a+ logo

๐Ÿ’ก High-Quality Power Relay Module for Raspberry Pi 4 3 2 Model B B+ A+ Review

4

ยท

Very good

Revainrating 5 out of 5ย ย 
Ratingย 
4.8
๐Ÿ–ฅ๏ธ. Single Board Computers, ๐Ÿ’ป Computer Components

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Details

BrandXYG-Raspberry Pi
Contact Current Rating5 Amps
Maximum Switching Current5 Amps

Description of ๐Ÿ’ก High-Quality Power Relay Module for Raspberry Pi 4 3 2 Model B B+ A+

Raspberry Pi Expansion Board, Power Relay. The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent. Standard Raspberry Pi 40PIN GPIO extension header, Supports Raspberry Pi A+/B+/2B/3B/3B+/4B and later versions. High quality relays, loads up to 5A 250V AC or 5A 30V DC. Photo coupling isolation, prevent interference from high voltage circuit

Reviews

Global ratings 4
  • 5
    3
  • 4
    1
  • 3
    0
  • 2
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  • 1
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Type of review

Revainrating 4 out of 5

Ok but confusing labeling

I needed exactly 3 relays for my Pi so this was the perfect design. The only real problem is their absurd labeling, which doesn't match the Pi's pin numbers or GPIO numbers. P25, P28, and P29 are labeled on the 40-pin HAT connector, but are not the same as Pi pins 25, 28, 29, or GPIO 25, and there are no GPIOs 28 and 29 on the Pi. For those who want To use this, here are the actual pins: P25 = GPIO26, pin 37P28 = GPIO20, pin 38P29 = GPIO21, pin 40.

Pros
  • Looks good
Cons
  • Not sure

Revainrating 5 out of 5

Product worked with little effort

This product worked after I spent some time fiddling around (thanks to Jon H for providing the GPIO numbers). By default, the GPIO pins must be pulled LOW to turn the relays on and HIGH to turn them off. I've used the RPi.GPIO library with Python with no problems. I could argue that there should have been documentation BUT as there are different ways to use the Raspberry Pi (Python, Java etc) I understand why nothing was included as they differ just to explain John's review X : Relay 1 - Useโ€ฆ

Pros
  • Free for educational purposes
Cons
  • Update available

Revainrating 5 out of 5

Eezy-Breezy - Computer Components

Great addition to your Raspberry Pi. I added this hat to my Pi 3B+ to power my 3D printer. With the Pi, I can turn the printer on and off, turn on the LED backlight while printing, and turn off some fans when the printer is idle. All of this is removed. Since I don't have time to attend to the printer on long print runs, I set it up for remote access when I'm on the road. I have a live video feed to test the print and the ability to turn off ALL power to the printer in the event of aโ€ฆ

Pros
  • Enjoyable
Cons
  • Mostly Good, But...

Revainrating 5 out of 5

Exactly what I needed

This board is manufactured by Waveshare. You can find a diagram and sample code on their website. The following information applies to the Raspberry Pi v2: Relay 1 - Pin 37 (marked P25 on the board) Piv2 GPIO25 Relay 2 - Pin 38 (marked P28 on the board) Piv2 GPIO28 Relay 3 - Pin 40 (marked on the board P28). P29 marked) Piv2 GPIO29* Labels on the board correspond to WiringPi code* All connections are low-active. 1=OFF 0=ON (LED also on) At boot the GPIO pins are configured viaโ€ฆ

Pros
  • Useful not just for its intended purpose
Cons
  • There are flaws