4-Digit Digital Clock Kit, Microcontroller Digital Clock, Four-Digit Digital Clock, Digital Production Kit Parts

This product is a 4-digit electronic clock kit that requires self soldering and assembly. It is suitable for electronic enthusiasts and major electronic vocational schools to install and learn from.

The program for the microcontroller has been approved, and an electronic version of the program will not be provided separately

Function Introduction:

 1. When walking normally, the time is displayed.

2. The hours and minutes are independently adjustable;

3. Time second correction function.
4. It is possible to adjust the speed of the clock, ranging from 0 to 9 levels, and defaults to the 5th level.
5. Two alarm clocks with independent switch settings.
6. The hourly reminder function can be turned off and on.

7. Equipped with a battery interface, it can operate when powered off. The battery only needs to be greater than 3V to ensure power-off operation. You can use two No. 5 batteries, three No. 5 batteries, or a phone battery.
8. Countdown function, which can achieve countdown within 99 minutes and trigger an alarm when the countdown ends.
9. Stopwatch function, which can realize the stopwatch function, pause the stopwatch, and reset the stopwatch.
10. It can implement a counter function and record the number of keystrokes. You can also record the number of external pulses.

The power supply for electronic clocks is also available in our store, a 5V DC power supply

http://item.taobao.com/item.htm?spm=a1z10.3.w4002 -3972079663.26.JAkl9w&id=3625502745

There are also battery cases for regular size 5 batteries

http://item.taobao.com/item.htm?spm=a1z10.5.w4002 -1438316121.15.zxn9bN&id=10349826229

Kit features: A. Using a 0.44-inch clock specific red digital tube for display;

B. Imported AT89C2051 as the main control chip;

C. 1.6mm thick PCB made of military grade FR-4 board, the thickest board on Taobao

                       D. Not many components, simple installation, high success rate, do not debug

E. Accurate timekeeping, with a monthly error range of about 3 seconds.     

The pins of the digital tube are basically inserted with foam, and the connection between the chip and the chip holder is bound up with instructions to ensure that the receiving feet will not be deformed or bent. I know how troublesome it is if the chips with so many pins are bent or deformed, and if you accidentally break the pins, they will be scrapped. To avoid this problem, the owner of the store also thinks from the perspective of a buyer friend.

Each set of kits is individually packaged and weighs approximately 24g

As the saying goes, good value for money is what everyone wants the most. Our electronic clock kit is undoubtedly a good value for money. The circuit board is better and thicker than others, and the overall price of the kit is lower than others. How would you choose

The circuit principle diagram: