[2-Pack] DC 5V Relay Module 2-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger

I used these modules in a small project I was working on, relay's often require more current to energise the coil than what a microcontroller can provide, so you would normally use a transistor to drive the coil.These modules integrate the circuitry to allow the relay to be fired from a micro without any additional hardware.Worked fine.

they are very good. i am using them with Pyronix Enforcer V10 to operate 6 peizo sirens. these relays draw only 7mA on DC+ & DC- terminals to operate the circuit. And they draw 13mA on IN1 terminal to trigger the relay. so in total they roughly draw 20mAmps. this current would come from the Enforcer (the alarm system). but on the other side of the relays, the piezo sirens are powered by an old 12V 1amp psu. works really well.

Only tried one but works as expected. The indicator LEDs are a real bonus too. Great value too. Highly recommended.

Purchased these to increase the capacity of alarm outputs on alarm control panels and CCTV DVR’s and NVR’s. Only fitted a couple but they work as expected; build quality seems fair but only been in a few weeks so long term life has yet to be judged. Straight forward bit of kit at a good price point.

excellent and i used it in my car for my dashcam

Extraordinary little Device. Works straight from the Outputs of my Arduino Etc with no interfacing. Will switch mains voltages. Enjoy.

Great little relays, reliable and trustworthy. Used to decouple a home automation processor from a maglock amongst other things and was just the ticket

All worked straight out of the box. Nice feature is the jumper option to be active high or low.