2PCS DC 12v Delay Relay Switch Turn On Off Switch Module with Time Timer Timing Adjustable Potentiometer LED Indicator Display

to a little extended-timing function I was looking for as part of a proof-of-concept modification to a car climate-control package. Works exactly as described, with easy configuration via jumpers and a small potentiometer.Need a longer delay duration than a 555 or series 556 timer will reliably deliver? This is an easy option.

As is usual with electronic parts from China the documentation is lacking. This one has none at all but if you have any electronics sense it can be figured out and made to work as designed and sort of as sold. I gave it three stars for easy to use because of the "No Instructions". I gave it fours starts because the timer was not as stated in the description, but close enough for my project. And lastly I gave it five stars for value. Over all a good buy.

This product is everything I come to expect from Chinese electronic items sold on Amazon. Neither of the items received worked as described. No timer function what so ever. Relay only functioned as an instant on power switch regardless of jumper placement. Totally useless and a waste of my time, effort, and money.

This Timer Relay is Quite handy. No instructions come with it but the seller provided jumper information in the description, The timer is pretty accurate, and consistent. I just got these today (09-01-2020) and tested them but I can't speak to their longevity or dependability, That being said they seem to be well constructed and they definitely do the job i had for them. I do recommend them. one thing iI found out by trial and error is that you can trigger the relay with one wire from vcc to trigger pin closest to the center of the relay board, (the pin next to the power supply blue block).

Relay pack works great, Heed the reminder to watch you voltage.

Had to return because would not operate how it was needed. Ordered another type.

Great timer circuit

OK gave this an initial 1 star due to vague description (using 12v dc), but after adding a transistor(2n2222) to the trigger of the relay with a 250k ohm resistor to the base was able to consistently trigger the timer circuit with no issues.