DC 5-36V Digital LED Relay Board Dual-MOS Cycle Timing Circuit Switch Timer Delay Module Turn On Off Relay Module

Plugged it up to my test bench and went through all of the settings. It is exactly what is advertised and functions every time perfectly. Have run it through 70-some cycles in playing with it (many of which because it is silent and was expecting the relay "click").The instructions and reviews IN THIS LISTING explain everything. Reviews saying "no instruction/manual" are effortless reviews. If you are buying this and do not already know how it works or know how to self-learn by finding information on a sheet or page, you should pay a professional and not burn your house down.I will agree that the packaging could be a bit more robust considering it is a circuit board, but it works perfectly so I refuse to "one star off" it just for that.I am using P-4 as it applies to my project. Once you spend a few minutes reading the description (acknowledging that this is most likely a direct chinese-english translation) and the great reviews here, the settings are pretty simple. Being able to go all the way down to 1/10 of a second up to 999 minutes is a nice range for for the price!Bought 3 more to complete the N S E W functions of my project.5 stars well deserved.

The instructions are very cryptic. It talks about different modes of operation but does not explain what they mean or how it is supposed to operate. Very, very difficult to program. Nothing happened until I depressed and held the SET button. The display kept turning off after a few seconds.Two electrical engineers with Masters Degrees and a computer savvy 13 year old genius couldn’t get this timer to work. After several hours of trying to make sense of the instructions, clearly (or rather unclearly) translated from the original Chinese, we were able to get the time set to 30.0 seconds (we think).But then when we tried to get the timer to run, the display kept shutting off and nothing happened. I believe it was dead on arrival.In my professional opinion; junk. Both the product and documentation. Amazon should be ashamed. I have purchased a lot of stuff from Amazon, mostly great, and a few clinkers, but this Timer is lucky that zero stars isn’t possible.If Amazon were to send me a couple of operating timers of this design and I could figure out how they work, I would be happy to write real and understandable English language instructions.I am returning it.

Had a minor issue with the original product ,but customer service promptly replaced the unit with an upgraded unit at no charge. Welds like a champ!! Now I can get into rebuilding my battery packs. Would definately do business with them again!!!

The media could not be loaded. It was cheap and operated as described. There isn’t anything in the box. All the instructions are in the product description. I needed a digital timer for my exposure light and this did the trick.

I don’t know what is hard about instructions or diagrams but failed to put in either. I have used other timers without issue. When I use a common power supply to switch, it seems to short the unit out. I decide to solder the common ground on the board but it made no difference. Still appeared to short out the unit. Running a 5v power supply. If someone can explain how to run a switch using the same power supply that would be great.

Have not used it yet but it appears to be just as it was described

I needed something that will periodically switch load on powerbank to keep it from sleeping. This one is very versatile with many switch options. Works well with 60 seconds off - 0.8 seconds on settings

Relay is easy to program but I cannot get power to load. V+ to + out is shorted internally. I can set the timer and it times down. I see an led on the unit I would suppose it would come on when ground gets connected but this does not happen. If that worked this would be a great little unit!