12V Timer Switch - Programmable, DC/AC/Solar Battery Powered | 12 Volt JVR Timer Relay

These are really slick & reliable. I have two - one that I've had for over a year and another I just received. They state up to 16 on/off programs but my new one actually has 28! I use one for cycling 12v power to my wifi router for a nightly reboot. The other I use to cycle 120v power to my laser holiday lights because the laser lights otherwise only stay on for 6 hours. I took the holiday lights down last year and one year later I took them out of storage and the programs and clock were still held in memory and still accurate. As noted the battery keeps the memory but the relay only operates when 12v is applied on the power terminals. But you can cycle off the 12v power as I do with my holiday lights at dawn, then when 12v is reapplied (at dusk) the timer operates the relay again on the set schedule. One thing the manual does not mention is that you can also adjust the seconds for each on/off time. To set seconds, when you are in program mode for any on/off sequence, just press the "manual button" to advance the seconds - it shows the seconds on the screen, in addition of course to day, hour, and minute. So for the router I use just one program set to on at 2:00:15 and off at 2:00:00 - therefore off for just 15 seconds at 2:00 AM. Really slick, love these!

I bought this to control a automatic chicken coup door I built, it does the job without breaking the bank. It has been running for about one week without any issues. The battery backup feature is great, the unit will not lose time or programming. The relay (contact) will not function on battery power, just for your information. I read some reviews before purchasing, some people had problems figuring out the wiring and programming. I had no issue with either on the unit I received, the terminals are clearly labeled on the back of the unit. Crimp-on spade terminals are needed for the wiring connections, there are no set screw seizures on this unit. The programming is really easy and intuitive, I only had to glance at the manual once. This unit has an automatic locking feature that cannot be disabled as far as I can tell, in order to make any programming changes you must first press the C/R button four times. This may be annoying for some, but I think it helps prevent inadvertent changes to your schedules/times and it only takes a second to unlock. There is a light on the front to indicate contact closure, a nice feature to know the relay is functioning at a glance.

I got one five years ago and it worked great for my purpose all summer. After not using for several years, it still works for a new project. I thought the backup battery would be dead; but it charged up and is working well enough so when I disconnect to move it, it keeps all my timer settings.

When trying to setup the device, the MINUTE digit wouldn't display correctly. The Day and hour were correct. I just wasn't able to set a time for example to be 11:15. I am returning the product and have asked to have another one sent to me. I'll update this review when I receive it. One star so far. UPDATE: The replacement arrived the following day (haven't even sent the first one back yet ... good job, Amazon. It works fine. The programming works. It would be nice to be able to set the entire week, for the same ON/OFF schedule rather than repeating it 7 times. Still, a nice little device that does exactly what it is supposed to do. Updated to 4 stars.

Setup was pretty easy for me. Plenty of cycles.

worked great and I was really happy with it...for about 12 months. then just stopped working. It was inside a chicken coop and out of the rain. Not sure why it would stop. gonna shop around for a diff brand. A lot all share this same form factor, so i'll find one that doesn't look like this.

I needed a simple timer to control the low voltage house number light fixture of my home. The light is powered by the doorbell transformer and was on constant. Setup, install, and programming was a snap. The timer has a useful red light indicating the "on" mode. The only negative is the programming does not allow overlapping programs, i.e, one program for winter hours and one for summer. It does allow on at 2 pm, off at 3 pm, then on at 4pm, etc.9

Worked perfectly with my 12 volt battery powered Christmas tree setup. Used in conjunction with a solar panel and a deep cycle battery to keep my 20 ft Christmas tree running all night long, every night during the Christmas season.

Couldn’t find a timer that actually ran on 12 volts and could act as a timer for a 12 volt circuit to switch on and off a fuel pump This one worked great and does exactly what I needed

Has way more times you can set in 24 hours than what I need. It seems complicated at first but it gets easier if you have to do it often. The instructions are a bit hard to follow.

Using on a solar pump circuit It’s a nice little timer with a lot of functions Good buy for a 12vdc timer

works great and pretty easy to program

Fonctionne très bien 24/24 depuis 2 mois