Digital LED Clock Kit 6 digits with AT89C2051 soldering kit

CAD 7.95

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Availability: In stock (can be backordered) SKU: 26233
Quantity 3 - 9 CAD 7.16
Quantity 10 - 24 CAD 6.96
Quantity 25 + CAD 6.76


LED Clock Kit kit, easy to assemble (takes about 20 minutes). The clock program is on a pre-programmed 8051 compatible microcontroller.

Size of the module:70 x90 x 15 mm

Power supply: 5V internal (6.5-12V external)

The kit comes with an English schematic and some Chinese instructions, but it is very easy and straightforward to build, also without an understanding of the Chinese instructions! No worries at this point. The clock can be set using only 1 push button – super simple. There is a socket for a CR2032 lithium battery on board, but the battery would have the display to power as well, which causes a current draw from the battery over its limit, resulting in a voltage drop to a point where the microcontroller freezes. So please just ignore the coin cell socket.
Check out our other clock kits:
4-Digit DIY Clock with alarm, countdown and more
4-Digit DIY Clock with large 1-inch digits
Digit DIY Clock with moving LED “seconds-hand”

3 reviews for Digital LED Clock Kit 6 digits with AT89C2051 soldering kit

  1. 5 out of 5

    reedb (verified owner)

    Fun, hackable, very easy to build. Draws about 1.65ma @3 VDC on standby (no display) so two AA batteries make a better backup supply. Easy to add a switch so only displays when pressed. -Reed

  2. 5 out of 5


    Wonderful practice material for a beginner. Clear and simple.

  3. 4 out of 5


    Fun soldering practice project and you end up with a digital clock. Be careful when soldering some components as they have polarity and must go in the correct way. There are some good online tutorials you can follow if you’re not sure. I found the LED colons between the digits a little too bright so I took out the associated resistor (R2) and left them off, but you could just put in a larger resistor, say 1K vs 470 to make them dimmer. It’s not a high quality PCB so if you mess up and have to de-solder something, be careful you don’t break the traces. Lastly, one site recommended to not use the button battery as it will eventually cause the micro controller to freeze up. I power it from the screw terminals with a DC power supply and it’s been working fine and keeping good time. 24 hour format only.

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