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4 Bits AT89C2051 based DIY Digital Electronic Clock


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₹ 265.65

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Function description:

  • Normal working, hours/minutes display.
  • The hours/minutes are adjustable and independent;
  • The second time correction function.
  • Running can fine-tune the clock speed, 0-9 file is adjustable, in 5 files by default.
  • Two way alarm clock, and can set alarm switch independently.
  • The hour prompt function, and can close the opening hour prompt functions.
  • Equipped with battery interface, can run when power supply drop. Working with greater than 3V battery. Use two 5 batteries, three 5 batteries, or cell phone battery is ok.
  • The countdown function, and can be implemented within 99 minutes of the countdown, alarm, the end of the countdown.
  • Stopwatch function, can realize stopwatch function, can suspend a stopwatch, reset a stopwatch.
  • Can realize counter function, can record keystrokes. It can also record the external pulse number.


  • Voltage: DC 3.7V-5.5V ( You may use 3 AA 1.5V Batteries)
  • Size: 52 x 55 x 1.6 mm
  • Weight: Approx 25g


  • 0.44 inch clock use special red digital tube display;
  • Import AT89C2051 as main control chip;
  • 1.6 mm thick PCB made by military level FR - 4 plates, the most thick plate
  • Few components, installation is simple, high success rate, don't debugging
  • As accurate, as error range in 3 seconds.

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