Jbtek 8 Channel Relay Control Panel Plc Relay 5V Module With Optocoupler For Arduino

This product is very amazingAnd nice working

Replaced 2 nd time now got working relay. Product quantity is very good. But I think because of packaging it damaged previously.

Works out of the box, although some pins bend i guess in shipping which shortens the usable area on pins for me(permanent damage) cannot straighten them, but the product works , jumper config wors as well. Happy with purchase, just use better pacaging to ensure rigidity of the product.thing it as favour for good product that nt complaining about damaged pins.

1st time i got item with all connector pins bent, i exchanged it, then again all pins were bent. Didnt return it, decided to keep it. When i checked it it was not working and they were not taking return

Best relay for home automation. I used it in my home automotionsensor.com project and controlling my light using goole home mini.

Capable for only lessthan 20 watts per each relay ..like we can control led lights ...etc.

This is not the best in the market. But considering the price point this is good alternative from the branded one. I've faced some power alterations and earth humming issues with this one. But overall a usable 8 Channel relay for your next project.

One star less for packaging. All the pins were bent, should use proper packaging. Relays are not of Songle brand as shown in pic.

I purchased this relay module to do some prototyping. It has worked well with the boards I have in house at the moment: * Raspberry Pi Model 2 B V 1.1 * ST Nucleo F411RE.Both of these have 3.3V GPIO pins, but the array worked fine when wired correctly. Please keep in mind the maximum current your micro-controller can drive. Both the PI and the Nucleo can operate a few of the relays, but you'll probably need a separate 5V supply to operate all 8.There are a number of good tutorials on how to utilize a relay array with the pi. There's a little less documentation for the nucleo 411 RE, still everything worked on the first try. I wired the following pins from the relay board to the pins in the CN7 connector on the nucleo: * VCC to pin 18 (+5V) * GND to pin 22 (GND) * IN1 to pin 17 (aka PA_15) * IN2 to pin 15 (aka PA_14) * IN3 to pin 13 (aka PA_13)Then I wrote the following code:#include "mbed.h"DigitalOut myled(LED1);DigitalOut relay1(PA_15, 1); //high is offDigitalOut relay2(PA_14, 1);DigitalOut relay3(PA_13, 1);int main() { set_time(1436486851); while(1) { time_t seconds = time(NULL); myled = !myled; relay1 = (seconds % 3 == 0 ? 0 : 1); relay2 = (seconds % 3 == 1 ? 0 : 1); relay3 = (seconds % 3 == 2 ? 0 : 1); wait(1); }}Sure enough, the nucleo kept 1 out of the 3 relays I had wired on each second, and cycled between them.

some simple connection instructions would have been useful, even if just a link to a web page with good diagrams. I am using mine to drive the lights of an outdoor replica of a German train signal.I am driving it with an ESP8266 which has 3.3V outputs. I was however advised to provide 5V to both the VCC pin next to the inputs and also to the JD-VCC pin for the coil relays. This is easy to do with a single 5V power source which can power the ESP8266 and the relay board as shown in the diagram. Note the GND pin next to the inputs should be left unconnected in this configuration.I was surprised that I could feel some warmth on the relays that are on.Note that the relay board (in this configuration) does hold the pins high on power up, so one cannot use pin D8 on as an input as the ESP8266 will not boot. I switched to using D3 instead of that pin.Each coil seems to draw just 60mA when on and the IN pins draw just 0.047mA each.I would buy this again next time I need a big bunch of relay outputs for switching AC power.

Used this to create an 8 channel Christmas light controller. Two channels failed within a day. Though the relays are rated for 10amps, the two channels that had 10 sets of incandescent lights each failed. Two sets of 5 strings of lights is about 3 amps. It seems to handle 1.5 amps so far. If you are going to use this product for Christmas lights stick to LEDs. It was easy to integrate with arduino nano though the labeling for normally open and closed is a little confusing. I used No. 14 wire which just fit in the connectors on the board.Update: More probably the issue is low duty cycle. One other reviewer suggested that the duty cycle is about 4000 switches. I ran about 6700 cycles per day per relay and relays started to fail after a day. I ran 16 channels for 2 weeks and had maybe 2 channels still switching. Fortunately, most of the relays failed on so I still had some Christmas lights. The relays were not burned on because they would randomly begin switching again for short periods.

This is an array of eight little relays capable of controlling AC or DC current and perfect for small battery projects as well as for use with 110V or 220V line current. (Check the specifications and your comfort level if you are planning to control higher voltages though.) Each relay is controlled by a single line from the Arduino and has connectors for normally open or normally closed. The board also needs a ground and 5V VCC hookup. These can come from the Arduino. (I don't know if they'll work with 3.3V logic levels, probably not.)I've been using this array to control AC electroluminescent (EL) wires, and they work well. They are a bit noisy, but the relay clacking sound effects are what I want for the project. So far, I've only tested the relays with a 100ms delay, and they work fine. Since they are mechanical, I assume that there is some top speed. If you want to do 5ms switching, odds are you should get a board with TRIACs like the Sparkfun EL Sequencer or roll your own.

Super simple to use with a raspberry pi. I made a sprinkler controller with it. Didn't get give stars because it had a bad relay on the board. Better to buy one larger than you need so you can work around any failed relays.Here's example code to use to control it on a pi:Sprinkler pi $ cat water.py#!/usr/bin/python3from gpiozero import LEDimport sysimport timelookup = {. # gpio pins I connected to each relay 'back1': 14, 'back2': 15, 'back3': 18, 'back4': 23, 'front1': 4, 'front2': 17, 'front3': 22, 'front4': 10}if __name__ == '__main__': station = lookup[sys.argv[1]] duration = 60 * float(sys.argv[2]) startWatering = LED(station) time.sleep(int(duration))And example cron entries to schedule it:0 8,23 * * * /usr/bin/python3 /home/pi/git/sprinklers/water.py back1 1011 8,23 * * * /usr/bin/python3 /home/pi/git/sprinklers/water.py back2 10