HiLetgo 12V 1 Channel Relay Module with Optocoupler Isolation Support High or Low Level Trigger

They work but weren't correct for the application I was using them for

Used for Ham Radio Amp InterfaceI needed to isolate the radio from a vintage Linear amp

Used to connect 12-volt trigger from a A/V Receiver (Denon but another's work the same) to flip the input switch on a Pyle Ps1000 power sequencer. The sequencer powers up my sub-amps and other devices I want to power-on when I power on the receiver. Just wired ground and 12-volt from the mono-mini audio output connect (trigger out) to the ground and 12-volt on the switch. Lights it up and shows it is working. Wired ground and red-wire (sorry not sure on the pin-out 4 DIN input cable that came with the Ps1000 but testing it manually was easy) into the Ps1000 switch input and it does the trick so far super reliably. Would be nice if this has a little case to keep the switch in - it is just sitting on the shelf behind my A/V equipment.

I used this product only 2 months. Today it was stopped working. When bought at new it working very good and relay response very fast. Now stop working and data leg not receiving and responding signal anymore. Recommend for testing only.

I used this relay module to trigger the starter circuit in my car with the signal coming from the push button start module. It outputs a +12v but I wasn’t sure how much current the module could output so this relay module fit the bill because it takes a very very low current to trigger.

This relay module works well. It can be triggered by connecting to power or ground depending on how the jumper is set. Web page says 5 ma but that is for the trigger, the relay takes 43 ma at 12.5 volts when the relay is on and takes 5 ma when the relay is off. I was going to use this for a solar power for a project but even though 43 ma operating current is relatively low, I need every ma so wasting 43 ma on the relay will not work so I am going to look for a latching relay. If you need a relay triggered by a low current then this might work for you.

This relay did not work as intended. Usually a relay will energize its output terminals when a trigger signal is supplied. This one did not. Nor did the first one i ordered. I sent the first one back. Second one additionaly had defective phippips head clamp terminals. Had to solder my DC+ wire to the terminal. The fix for this relay is a jumper wire from the Dc+ to the COM output. The relay switches just fine but without the jumper wire no power to any of the output terminals. The relay is so sensitive that it functions with the 2.5v 800mA Dc trigger signal while on the high jumper setting. The low jumper setting was defective on both relays and did nothing.This relay is garbage. I'm only using to trigger 3 car stereo Amplifiers simultaneously as the 2.5v 800mA trigger signal I have is not enough. This is a non critical low amparage application. My load is probably less than 1.5amps @12v. Highly not recommended for anything critical or safety related.

Very few technical specs. I had to get numbers via experimentation because nothing was available. On high trigger relay makes at 1.28 v 0.23 mA sink and breaks at 1.21 v. 0.17 ma sink. Full voltage it sinks 10.68 ma. Low trigger makes at 10.85 v 0.213 mA source and breaks at 10.92v 0.162 mA source. Never tested at 0 v. But I assume it would source about 11 mA to ground max in high trigger. This is all with 12.12 v in from power supply.