DROK Time Delay Relay, DC 5V/12V/24V Timer Relay Delay-Off Cycle 0.01s-9999mins Adjustable Trigger with LCD Display Support Micro USB 5V Input

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.

So far this works flawlessly. I needed a delay device to switch out the surge protection device once steady state transition is accomplished in my audio amplifier. Unlike other delayed relay devices out there this one does not only need a momentary switch to trigger it. Just power on. The only question now is how reliable will it be. I will update if there is any problems. Instructions are hard to understand but I figured it out by just playing with it for about 30 minutes. That’s why I gave it 4 stars .

I bought this for no reason because it seemed like something that would eventually be useful. And it has, and works well. That's à droite. À gauche, hold on to the instruction sheet because you'll never figure it out otherwise. It does have a UART connection, but not through the USB power port. Three solder holes, and as usual, you have to guess whether TX means "my TX, your RX" or "your TX, my RX". It's the latter. It will only accept commands given very quickly--you won't be able to type into a terminal program, and in fact the only command I could make work at all was "read". (And only "read", not "READ".) By the way, I need to find out who invented the abbreviations MISO and MOSI and send that person a thank-you card.

Exceeded my expectations in every way! For my DIY Solar Tracker Solar Power Set-up this timer was one of the last tech items needed. I was getting concerned, however, this specific timer seemed to have the best instructions and the listing allowed me to at least ascertain it would do the job. 4.17 seconds ON every hour indefinitely. ON 4.17 seconds OFF 3595.83 seconds repeat

Relay is fairly straight forward to use. I had one issue with the high trigger and a normally closed switch. I wanted the thermostat wire and the NC switch in line with each other, so the furnace would shut off while the timer let the fan continues to run through the timer relay. The countdown timer would start when thermostat removed the signal, but as soon as it reached zero, it would start over the countdown. While testing with a voltmeter, I noticed the negative signal ground had a positive voltage of 0.05 volts during operation. When the timer reached zero while shorting the negative and high signal terminals, the relay shut off. So I had to place a diode between the two terminals for this to work. If someone has an explanation, I would be glad to hear it. I also wish the terminals held the wires more securely than they do.