5v Relay Module 5V Indicator Light LED 1 Channel Relay Module for Arduino ARM PIC AVR MCU

Before I give my review... I wanted to share some information. I have read a lot of the questions and reviews of this device and it seems there is a great deal of confusion as to what exactly this relay board is and what it is intended for. I've been in electrical engineering / technical trade for over 30 years. This is a very simple relay control board intended to allow you to control a heavy load (110VAC, 12VDC light, Motor, etc...) up to 10Amps.. although I would not actually try driving a full 10A with this board. It is NOT a power supply, it does not generate AC outptut, or DC power. It is simply a controlled switch. I have uploaded a simple circuit diagram that depicts this relay and how it might be hooked up to control a simple 110VAC Light / Lamp from an Arduino output. There are a lot of other examples of how to wire this board out on the internet.Now for my review... I have purchased about 5 of this relays over the past couple of years. I use them with the Wemos D1 Mini control board and I have 1 controlling my custom smart wireless doorbell (doorbell button sends signal to my D1 Mini to close relay and ring doorbell chimes). I also have several of these wired inside my arcade machines to power them on or off via Alexa commands. They have all worked perfectly and I have never experienced any issues with them.They are a great board for the price and I plan to purchase more for some other projects I plan to do for home automation.

Currently I use an Wireless Android Auto dongle in my car, and the USB port doesn't shut off by itself. I wanted to be able to use the adjacent 12V power source to control the power signal through the existing cable, so that when the car shut off the power to the dongle would be immediately cut.I originally wired a Y splitter cable to split the power wires off to a different cable, but it didn't work properly. This relay works perfectly for my use-case.For the control signal, I soldered the power wire of a cut USB cable to both the S and + pins (left/middle, tied together), and the ground of the cable to the - pin (right). The USB data wires were not needed.Next, I unsheathed a section of of another USB cable, and cut the power wire, wiring one side to the "NO" (normally open -- left) terminal, and another side to the "common" terminal (middle). I tapped into the USB ground wire and soldered that to the - pin where I had previously connected the ground from the other USB cable.You can search the Internet for "Keyes 5V Relay Module manual" to find some documentation.

I had done some prototyping with a dual relay board, which was triggered on a HIGH signal. I only needed a single relay, so I bought this one. The actual relay component was identical. but this relay board is triggered on a LOW signal.

Needed to bump up a very low signal coming from a Victron Solar Controller and this did the job.

Ordered and was delivered in 2 days via Prime. Packaging and everything was great and it arrived in good shape.I just hooked this up to my circuit and tested it out. I have 5 Volts running to positive and negative terminal pins and when I apply 5 volts to the in1 (labeled a bit oddly as IPP ON (InPut Port On maybe?) then I hear the coil flipping the switch inside with a nice click.I have a separately powered circuit running about 2.3 volts with a 330ohm resistor and a small red led. That circuit runs through the NO (normally open) side so it is not lit until I input the 5v on the IPP. When I do, I hear the click and I see the red LED turn on.It's just a test set up but this is one of my first projects and it is so cool I keep applying/removing the 5v very quickly and hear the nice switch clicking away inside the relay and seeing the red LED turn on and off very fast.Lots of fun and a great little product. I will buy more from this company because the product works well and their shipping was great.

Used this for GPIO controlled from a DigUno for some 24v LED. Works well and easily configurable. Wire terminals seem to hold well, however, time will tell

I have a computer that I use to run CNC equipment. The equipment gets 5vdc from the computer and 12vdc from another power supply. I needed a way to engage the 12v system when I activated the computer. This was my solution, and it works very well. You get an auditable CLICK so you know it is engaged.

I needed a small relay for my grandson's science fair project, and this relay was a perfect match. it works flawlessly and its small footprint makes it easy to install in a project box.