DROK Electronic Thermostat Controller, DC 6-30V 24V Digital Temperature Control Board -50 to +110 Degree Celsius High Accuracy LCD Digital Micro Temp Control Switch Module with Waterproof Sensor Probe

Quality seems to be good, and it's easy to configure. Wish it could switch to fahrenheit, but it's not a big deal because you set it and forget it. When you cut power to the controller it retains the settings. We're using it to control a small ventilation fan for the electrical compartment in our camper, and it's been working flawlessly! Small size, great value!

Works well. I see some comments about failures. I have used it for 2 weeks now and so far so good. I have it wired to a video receiver. The cabinet doesn't meet the recommended clearances, so I bought this to control a USB powered fan. (connectors bought seperately). The wiring isn't completely intuitive. I got out a VOM to understand what the connectors and switch did. To be honest, I then looked at the wiring diagram and it showed the same thing, but I didn't look until I was done. Of note, the USB is 5v, so it does work a little lower than 6. I'm sure others might want a USB powered option.

So far the only complaint I have about this this is the utter lack of any sort of documentation on how to use it. Other than that, it has worked great for the 45 minutes I spent playing with it. After a few minutes playing with it, however, I figured out how to use it. Here's the scoop, in case this helps anyone: 1. Run power to the +V/-V pins on the terminal block. I used a 12V power supply and everything worked. 2. Connect the thermocouple sensor. Mine came connected so you may not have to do this. 3. Connect the thing you want to control on the other two pins on the terminal block. It's just a relay aka switch, so it doesn't matter which lead you put where. That said, the unit DOES NOT SUPPLY POWER to the device you are controlling, so you have to treat this as a switch. That is, run one power lead (say, +V or "hot") to one of the switch pins on the thermostat, connect one end of your device to the other pin, and connect the other lead of your device to the other power lead (GND, -V, or "neutral") 4. Power up everything. The thermostat will need to be set before it does anything. This is really easy but undocumented. a. press SET until things start blinking. b. the bottom line will say C or H, followed by a temperature. C means "cool to stay under this temperature" and H means "heat to stay above this temperature". Press SET until the C/H indicator is blinking, then UP or DOWN to change between C and H. c. press SET again so the temperature to the right of C/H is blinking. Press UP or DOWN (you can hold these down to change values rapidly) until you get the temperature you want. If you selected C, this is the temperature where the relay will OPEN i.e. stop running your fan/cooler/whatever when the sensor cools down. If you selected H, this is where your heater/whatever will turn OFF. d. press SET again until the top temperature blinks. This is the "hysteresis" temperature. Basically, this thing controls where the relay will CLOSE i.e. turn on your fan/cooler/heater whatever. KEY THING TO UNDERSTAND: the hysteresis temperature is the difference between the "ON" point and the "OFF" point. Example: if you pick C20.0 on the bottom line and 5.0 on the top line, the thermostat will operate in Cooling (C) mode. It will turn on the cooler at 25*C (77*F) and it will turn off the cooler at 20*C (68*F). It will always try to keep the temperature between 20 and 25. Another example: if you pick H10.0 on the bottom and 10.0 on the top, it will be in heating mode and will turn on your heater at 0*C (32*F) and will turn it off at 20*C (68*F). If this doesn't make sense, just remember that in cooling mode it will keep the MAX temperature below the bottom PLUS the top value, and in heating mode it will keep the MIN temperature above the bottom value MINUS the top value. The larger the top value, the larger the allowable swing in temperatures, and the longer time your heater/cooler/whatever will be operating while it is doing its thing. That said, it will also run with fewer starts/stops, so that may be good for the lifetime of the heater/cooler/whatever.

Excelente producto

It’s garbage. I’ve tried several different ways to wire it just over 13 V in and on one occasion I saw 2 V out but most of the time I get no power out even though the relay is on. Documentation is garbage as well but that’s not surprising given where it’s from. The picture on the product page is not accurate either for the wiring. Even the screen printed markings on the item itself doesn’t seem accurate. It says V plus and V minus. And two other markings for the load, which is not accurate it does not work.

Very easy to use. There are not a lot of programming steps, which makes it good for quick changes. I am using this to control a greenhouse heating mat. There is a mode (heat/cool) set point Temp, temp range, and alarm function. There is also a serial out for communication. I'm only using the temp on/off functions, so I don't know about the alarm and serial details. The only things, I would wish were different is the temp only reads in C, and the display's light is always on. Otherwise, its great for controlling 120V heater mats with minimum fuss.

I used this for a power supply cooling fan controller in a 3D printer. Easy to program, and works great. I had to work some tweaks with the cover so that it could be mounted to it and still be programmed and read from outside the enclosure, but it worked out well enough as it's not something that needs to be changed much - if at all - once it's set. I would have preferred if the display and operator buttons were arranged so the card could be mounted directly to a panel face, but it is what it is.

These are pretty reliable for the price. Not too difficult to set up. I chose this over other options for the ability to change from Celsius to Fahrenheit.

Screen is bright and easy to read. Controlled a small 24vdc fan well until the fan failed. Setup is also easy, for basic temp control instructions weren’t even required. For audible alarm they would be needed, but not what I bought this for and this instructions are quite clear if one wanted to use this feature. Can be powered via terminals or micro USB as seen in photos.

Il fait exactement ce qu'il doit faire. Par contre, un peu dur a programmé