XY-WJ01 Delay Relay Timer Module DC 6-30V 12V 24V 0.01s-9999min 50mA Digital Timer Period Switch AC 220V Power On-Off Controller LCD Display Button

The timer works very well after I determined how to use it. There were no instructions or documentation in the package. Had it not been for YouTube, I would still be trying to set it up. Or, I could have returned it for credit. What retailer sells a complicated device with no instructions or owner manual????

It’s a bit difficult to program. You need to DL instruction off the internet, which are not particularly well written. But once programmed it works fine.

I assume this timer is basically the same as all the other timers on Amazon that look like it but this particular one was the cheapest I could find which is why I went with this one. They can also be set to an interval time as low as .01 seconds which is the fastest I could find as well. I'm using mine to power a microwave oven sourced transformer in a homemade spot welder for lithium battery cells. Haven't used it a ton yet but so far it has done exactly as it needs to do without any problems so the product seems solid. You don't get any instructions with it and unfortunately the descriptions they have on this page are terrible. Do yourself a favor and Google "XY-WJ01 manual" and you will find PDFs with much, much better directions. I'd give this thing 5 stars because for the price you can not beat it but I have to knock one star of for a couple reasons. First being the directions; this thing is actually capable of a lot of different modes which could be very useful to some (and you'll see them in those PDFs) but going just by this page I had no idea; so really they're selling themselves short, the product is really good but the English is really bad. Second is the barely mentioned external trigger functionality! I'm triggering my welder with a push button on one of the handles, but you might not even know you could do that from the description. They do try to mention it but barely. There is a 3 pin connector on the board inside of the box which has a shared common, a low voltage trigger input and high voltage trigger input. (Again those PDFs I suggested have the descriptions and voltage ranges listed). So again they're selling themselves short on a super useful feature! Also, they do not include a harness for that 3 pin connector but it is your standard modular type plug so you can probably find one somewhere like I did (I think it came off and old car alarm box I had sitting around). So overall it'd be nice if they included that harness and simply making a better website would make this thing perfect in my opinion, but even with those minor faults I'd still recommend this to anyone looking for one of these without hesitation.Oh! I almost forgot the best part! So the first time you power it up you'll see the time interval on the first row at default "0000" then the second row shows you the program mode, which default is "P0", then it shows the relay status which at defaults is open or "OP".........Heck it was worth buying it just to see that, it made me laugh!Thanks!

Used as a timing circuit

I have bought quite a few all worked as they should

A very necessary item it you are annealing brass with an induction heaterl

Only a 4 because of the TOTAL LACK OF USEFUL instructions. Go find a youtube video to figure this thing out, but after that it works just fine. have it wired up to a trigger switch and works everytime.Pay someone a few bucks seller to write real instructions in english and slip it into the box.