DROK Timer Relay

The rear wiper on my jeep only has one speed for intermittent timing, about 5 seconds. Too short for water to accumulate on the glass, so it makes an annoying squeaky noise and also wears out the wiper if you leave it on. I installed this device in line with the power from the switch for the rear wiper, and set it so that it will trigger the wiper every 30 seconds. Took me a couple of hours to figure out how to install/wire/program the whole thing and then put all of the interior bits back into the jeep. The new, longer interval is much better. It works perfectly, though. The instructions are very clear and the unit itself is rather intuitive to set up and program. The device has numerous other features and programmable settings to do more complex operations than what I used it for. Seems to be a good price for what it is capable of doing. I hope that it lasts a long time! If it craps out earlier than I arbitrarily believe it should, then I will come back here and complain about it in this review.

very versatile. i use these to periodically circulate how water thru my heating system to avoid frozen pipes. a little tricky to figure o ut the programming, but great units. the display turns off after 5 minutes, but you can defeat the auto turnoff if you want to keep display on. also, the settings stay when power is off, so no worry about losing your settings. these duplicate a unit i invented, called the pipesaver about 40 years ago or more, but now with these, my design is obsolete. just add power (can power with a small usb block and cable or other sources.) and hook up to whatever you need to control. relay is 10 amps up to 250v. these can be used as a cycling timer, or time delay o or off, etc. lot of uses.

Great piece of electronics. Using as an antenna rotator control (along with two wall wart transformers), since we only need two antenna positions. Works perfectly, easy to program and wire. From an experienced electronics technician.

This is a great timer module, unbeatable at this price. I chose this one over the many others because the function display appeared best (and it is). It is easy to set; with a little practice, you can easily memorize the very logical steps to set the various modes. I have explored all the timing modes, and P7 often suits my needs perfectly. It has fast startup, and can trigger when signal and power are applied simultaneously. Both high and low inputs are active, so it is possible (as in my case) to trigger and block timing by both these channels in opposition. So far, it seems to have good noise immunity, and works correctly every time. The instructions are an imperfect translation, but they do send a spec. sheet with the timer (which they keep improving with each order). I'm still prototyping, but plan on using these to time an automatic backup generator run for my PV system. I ordered more. More details to come as I finalize the application circuit. [UPDATE] I now have 5 of these involved in my project. I'm using P1 and P7 as general time-out programs, and P6 for the auto-starter (which cycles the starter every few seconds until the generator starts, or the cycle times out). I even use one to beep a warning horn for a few seconds before the actual starter engages, so anyone nearby is aware of the pending startup. I never would have pursued such a project if I hadn't found these! DROK sells other things too, and I'm eager to check out some of their other products.

I tried several version of this same device with dismal results but this one from Drok seems to be functioning properly. I use in a golf cart to light up the keyhole when it is being driven after dark so have it set on the simplest program for 10 seconds. The attachment for the wiring is sub-par unless you are using some really small wire, like 22 gauge. My other wish list item is that you could turn the display off. Mine sits hidden inside the dash so is never seen and once programmed, the screen serves no function although even with the screen on, it only draws 15-20 milliamps which is nothing for a lithium golf cart battery. Overall satisfied IF the wiring doesn't start popping out of those pitiful connectors.

This appears to be a well built board. It has pretty good documentation. Probably great documentation for the average person buying it. It functions as described. Easy to setup. No problems found using a 5V automotive converter. I especially like the various "programs" offered by the manufacturer. Bonus feature was a breakout for a serial connection that you can use to set all of the parameters with. I don't have a use case for that in my project but I can see where that would be extremely helpful for others.

These little guys became a huge part of the 'brain' I built for Halloween to trigger different effects at specific times. The fact that you can program them to start a countdown when triggered before the relay is closed (P4) made a HUGE difference. These along with other standard relays and an MP3 playback module were mounted to a board that controlled both 120 VAC and 12 VDC devices for a Halloween haunted house. They controlled flood lights, black lights, strobe lights, a fog machine, the audio module, etc. They were programmed to trigger at specific times in sync with the audio I had loaded onto the playback module when someone entered the haunted house and tripped them with an IR sensor. This automated my whole setup and allowed me to join in the fun and jump out and scare people instead of having to control the lights, fog and such. The relays activated every time and on-time. Coolest setup I've ever done. It was so effective that kids demanded I do it again next year. The only drawback to these is that some didn't ship well and the screens arrived cracked, so you couldn't see to program them. I ended up just ordering more and not requesting a refund or anything because the price is good anyway. Moral of that story is be VERY CAREFUL with the screens as it doesn't take much to crack or otherwise ruin them and without the screens, you can't effectively program them. All of the relays I used on this project were solid and worked every time without fault. I built and tested my Halloween automation board many many many times over the course of the month leading up to Halloween and it was activated by haunted house-goers many times on Halloween night and everything performed exactly as it should, every time. It was great fun to build and play with and impressed (and scared) a lot of people when the sound effects started when the entered the room, black lights came on by themselves, fog started rolling on it's own and strobes came on at the climax of the music. I intend to get more of these for backups and other projects and build even bigger, better and more complex next year. I highly recommend these relays! Please don't ever stop making or selling them!

the best feature about this item is that it has great instructions and labeling as well as wiring diagrams for devices connected to it. Comparted to similar devices that are either don't have any labeling, incomplete instructions, no wiring diagrams. I was able to wire and put into action the Drok in a fraction of the time of other brands. Of course, if you have done several of projects and intuitively know everything, then perhaps not critical. But if its your 1st time wiring one of these gadgets, Drok makes it easy for the unfamiliar as well as the English-speaking folk like me.

works fine as it should, it comes with a manual explains everything but they need to add it to the amazon description, I don't know why it does not go to sleep if it is in an infinite loop, I was hoping that I can reduce the power of the screen. I like the 4 stand pieces. I will update if anything bad happens.