MiOYOOW 4-Digit Rechargeable DIY Digital Clock Kit, SMD SMT Electronics Clock Soldering Practice Kit Light-Controlled Alarm Clock Soldering Projects for School Learning and Home Office Use

Given that there are a few great reviews, I am not going to repeat it all. This clock is a nice soldering project but it is fairly advanced (definitely not "your first DIY soldering kit" type), particularly soldering the 28 pin SMD MCU. USB connector wasn't really as hard, despite tight pin pitch. I highly suggest soldering MCU first as there aren't other devices in the way and it's much easier to clean up. If you've never soldered SMD, it's best to practice first as it isn't easy to fix mistakes if you don't have any SMD rework gear. I would suggest soldering USB connector first or second as well. Instructions are an online PDF which is actually quite good and has a lot of details and plenty of pictures. The rest of soldering is easy and just through-hole, it is just a lot of solder points. They are reasonably easy to fix though if you must. I really like the board layout and the fact that clock covers are transparent acrylic, it's really cool. You can go somewhat obsessive compulsive to align all the components. I actually like the fact you have to solder EVERYTHING. I personally feel many kids where all SMD are soldered on as a bit of a lame duck. However personally I am not fond of mixing SMD and through-hole. Socket while ugly, would have been a more suitable fit.I also wanted to give props to the seller, WHDTS. My first clock didn't work (I couldn't tell if it was my mistake cooking something or it was a defect) and seller actually reached out to me mentioning there was a packing error. I had already built my clock so couldn't provide PCB markings. Then I didn't have time to reply back. Seller has been very nice and quick to respond with actually useful information to help resolve the issue. Eventually a month later I emailed them for info and they did send me a replacement kit even outside the return window (I wasn't even expecting a replacement, was mostly curious what the issue could be). Second kit works great! Thanks for going the extra mile!

This little kit is good for a starter project. It has some variety of components, there is no wiring since everything is on one board, it comes with minimal documentation but at least it has something, and the online instructions are good.This has a temperature sensor but I have not found the calibration and it only reads out in C. It is necessary access the online instructions to be able to set the clock. It only has two buttons and you have to follow specific steps to set it up.This clock has batter backup and the kit includes the battery which was nice. The illumination is adjustable and has an auto mode so you can use it for a bedside clock if you want to. It also has an option to count down a tone on the hour. It can also periodically show the date and/or temperature.The soldering is straight forward and is a good starter for learning. It is very important to ensure you have all the components mounted before soldering on the display. The display will cover some of the holes so you won't have easy access once it is mounted.The display is readable across the room. As long as you have USB power you could place it anywhere that is convenient and still read it. You can access the date by pressing the left button and the temp by pressing the right button.All in all, not bad. I wish the temperature could be calibrated and displayed in F. The power cord is a little short for use as a disk or table clock. It needs a sticker with instructions you could put on the back for the setting modes. I will probably make one. It only displays in 24hr time. It would be nice to have a 12hr mode.

As a kit:I would call this an easy to intermediate assembly.The silkscreen is very easy to understand, and pretty much explains everything you need to know to assemble the kit.If you have any questions about it, the manual is useful, but not a be-all end-all.A small amount of knowledge of how to read a silkscreen is necessary to enjoy the assembly process.I enjoyed the process.If you plan to carry it around, you might want to conformal coat the solder side.As a clock:Once you've built it, you'll have an hours:minutes:seconds 24 hour digital clock to enjoy.This thing has more features than many desk clocks, and is rather quite useful, even if the UI can be a little confusing.Fortunately the manual does adequately explain enough that you can figure out everything else via experimentation.There's a convenient connector on the front that provides low-current 5v signal when the alarm buzzer is active.The manual cautions against going above 12v input, however the 78L05 regulator on the input accepts up to 35v.I don't know why you would want to apply 35v to your clock, but you can.I use it on a 2S LiPo battery. You'll want a battery monitor if you use a higher cell count LiPo.Clock Mode>As you power up your kit, you'll be greeted by the Clock screen.HH:MM:SS, with seconds incrementing and the colons flashing at 1Hz. Buttons S1 and S2 don't do anything. S3 changes modes.Time appears accurate. It only deviated by about two seconds from my watch over the course of a full day. I would trust this as an accurate clock.Timeset mode>Press S3 to enter Time Set mode. You'll see the time from before, but now all six digits are flashing. Seconds continue incrementing. Use S1 to increment the minutes, and S2 to increment the hours.Alarm Set mode>S3 from timeset mode sets the alarm clock. You'll be presented with a time on the display, with the colons steady.Use S1 to increment the minutes, and S2 to increment the hours. Continue past 23 hours (11PM) so the display shows --:--:-- to disable the alarm clock outright.Countdown Timer>S3 from Alarm Set activates the countdown timer. It remembers the set-mode you last used, but not the time you set.This could display any number of 0's with no colons, and the buzzer may sound.Press S2 to cycle through the digits, and S1 to increment the selected digit. HH:MM:SS, maximum value 99:59:59. Cycle past the last digit to activate the count-down. S1 doesn't do anything during the countdown.Stopwatch>Cycle past the countdown to display 00:00:00. This is a simple stopwatch. MM:SS:1/100's. Maximum value 59:59:99, cycles around if it overflows.Press S2 to start and stop the timer. Press S1 to reset.Counter>Press S3 from Stopwatch to get a simple counter. 00 00 00 with no colons will appear on the display. Theoretical maximum value 999999, but I'm not patient enough to find out.Press S2 to increment. S1 to reset.

El artículo está incompleto, es difícil armarlo, ya que no tiene instructivos ni videos de armado… la relación precio-calidad es pésima. Ojalá que me devuelvane mi dinero

This is SMALL...so you need to practice and have the right tip.Not great for a first or second project

The media could not be loaded.  Live in a small appartment so.perfeft for Christmas. Thanks.for super quick shipping schematics and awsome diy project. Love it!

First, the item arrived very quickly, in fact, a day earlier than expected. The seller followed up with en email containing a full colour PDF walk-thru (not just a link) paying close attention to details such as how to ensure polarity of the components. The only downside is that it doesn't come with a case or even a referral to where the right one could be purchased. In the end, I cut holes in the box and mounted it there until I can find or 3D print something better.

not good product