DAOKI® DIY Kit Module 9V-12V AT89C2051 6 Digital LED Electronic Clock Parts Components

The kit I received was missing all of the segment driver resistors ... Lucky for me I do alot of electronics so I had left overs from previous projects. I bought this kit to teach my daughter to solder she enjoyed the kit assembly more than what it does but all together it was a positive experience

Nice kit, fairly simple construction. The part values are marked on the PCB to make things easy. I only have a few issues.The 3mm LEDs have a wide variance in brightness. It's a bit touchy to program and with only one button you have to cycle through, if you over shoot. Also, there is no second set or zeroing function ( It seems. ) and seconds count up as soon as power is applied and while programing so it can be a bit inaccurate. Using a reference clock you can increase the second accuracy by applying main power when the reference clock is a 00s then add the 3V coin cell. Finally, there is no CR2032 cell included.Tips:You will need 3 jumpers made from spent leads clipped from components. I suggest the diode leads as they are the thickest lead that are long enough. Remember to add the jumper that goes under the LED display first, it will be a big pain if you forget and then solder in the display.You will also need a power source, you can use a 9V battery and clip or 4xAAA/AA cells and a holder. Or any other source of 5-12V DC. With my board it uses a 5V regulator so 6V plus is recommended, though I've seen some reviews that mention that 3xAAA/AA (4.5V) will work you should have an input with at least 1V higher than the regulator voltage for stability.Finally you will need a CR2032 3V lithium coin cell.The longest lead on the 3mm LEDs is the + connection. Keep a close eye on the polarity or the LEDs, One LED of the four is inserted opposite the rest.

This is a fun project, but maybe not for the beginner in electronics. The instructions are not very thorough, but board labeling is good and the circuit is easy enough to figure out.I had to order two kits because the first one came with two pin headers and no chip, but the seller refunded my first purchase very quickly. So now I have two kits, but only one chip. I might build the second kit just for the practice.A few things I noticed:1. Don't leave it unplugged from a power source with the button cell battery in it. It will kill the battery in about a week.2. The "colon" LEDs are do not flash, but they do sort of function as a power level meter. At 5V (USB power) the LEDs do not light. With 4 AAs (~6V) the LEDs will light and they dim as the batteries lose power.3. I drilled some holes next to the power pads so I could loop the power wires through for strain relief.

I love the fact that it was a fun little kit to learn how to solder what I don't like is there's really no instructions on how to use it you push the button it comes on push the button again the screen turns off. So I don't know what that feature is but it's definitely a fun little kit especially if you're learning how to solder and or have kids that are learning definitely recommend it and I'll leave and probably buy another one in the near future

Got most of it working. The minutes display is half dead. Hour display is faulty. Second display works great. Led bulbs on right side do not work at all. Replaced less and verified direction nothing. Bulb directions for positive side per instructions. Left top center, left bottom center, right top center and right bottom positive toward second hand display. First product like this didn't work at all. I was just hoping for better luck on this one that should be a combined digital display and not the same thing I bought last time. False advertising.

I rated this 3 stars as the units basically is working but the Hours are the only 2 digits that work fully the Minute and Second displays have the "C" Segments not working. I did locate and had to add two jumper wires to make sure all the 7 segment pins between displays were actually connected. Once I did the "C" segments worked for all displays. So I was able to fix the connections and all is good not

Fun kit to assemble, well printed PCB. Was able to teach my youngest daughter some of the components and what they do. Even let her try her hand at soldering. Was a little disappointed that one of the displays doesn't work properly and none of the LEDs work, also the lack of any instructions was upsetting. Overall a good little practice kit.

This clock keeps good time, as far as hours and minutes are concerned. But it ticks off the seconds in Twilight Zone mode, going from 0 to 10 seconds before resetting to zero. LOL. And the LED 'colons' will only light when I'm setting the time. Otherwise, it's a working clock, with extra added value as an entertainment device. I like it.P.S. it's February 21, and the clock died dead. It's a 3 week clock. Oh well.