Features:
The electronic clock adopts the principle of digital tube display design, adopts the design of plug-in components, and has high success rate. Contains six time animations to effectively show time and features. The LED flashing light contains four offline animation display modes, and the lighting effect is very decorative, which brings a good aesthetic to the home and the table. The electronic clock is alternately displayed with time and temperature, with precise travel time and power-off memory travel time function. With an alarm clock function, it can be turned off. With light control function, it can automatically adjust the brightness according to the environment.
The electronic clock adopts the principle of digital tube display design, adopts the design of plug-in components, and has high success rate. Contains six time animations to effectively show time and features. The LED flashing light contains four offline animation display modes, and the lighting effect is very decorative, which brings a good aesthetic to the home and the table. The electronic clock is alternately displayed with time and temperature, with precise travel time and power-off memory travel time function. With an alarm clock function, it can be turned off. With light control function, it can automatically adjust the brightness according to the environment.
Circuit principle:
Using the single-chip microcomputer as the main control, the DS1302 travel time chip provides an accurate travel time clock source, and combines the digital tube and the LED light to display the specific time value. Combined with the temperature light intensity detecting element, it is equipped with the brightness adjustment and temperature detection functions. The control button of the single chip is combined with the necessary key input adjustment function, and the clock sound is sent by the single chip processor and then sent out by the buzzer.
Using the single-chip microcomputer as the main control, the DS1302 travel time chip provides an accurate travel time clock source, and combines the digital tube and the LED light to display the specific time value. Combined with the temperature light intensity detecting element, it is equipped with the brightness adjustment and temperature detection functions. The control button of the single chip is combined with the necessary key input adjustment function, and the clock sound is sent by the single chip processor and then sent out by the buzzer.
Component list:
Common Problem:
1. The welding sequence is wrong. It is recommended to solder the LED lamp first, then solder the back component, solder the digital tube, and finally insert the chip.
2. LED lights pay attention to the positive and negative poles, long legs positive.
3. The chip notch and the base notch must be consistent with the notch identified on the board.
4. The buzzer pays attention to the positive and negative poles, the positive pole of the long leg, and the resistance value should be consistent with the identification on the board.
5. The triode should be inserted in the same shape as the board.
6. The digital tube pays attention to the direction, and the decimal point is below.
7. Power supply attention to the positive and negative poles, the power supply DC voltage is 5V.
8. Check for solder shorts and solder joints. This phenomenon is common.
9. If the display is abnormal or the time is not gone, remove the DS1302 and the button battery, then plug in the DS1302, do not insert the battery, and then power on, then put the battery after normal.
10. If the individual lights are not lit, check the solder shorts and solder joints of the unlit lights, check them well, and change the lights if they are not lit.
11. If the four digital tubes have the same segment code and are always on and bright, some LEDs are always on, because the electrostatic welding of one LED is damaged, resulting in a digital tube segment code and other LEDs sharing a single-chip pin with this lamp. Affected, the solution is to switch to the clock LED full light mode, observe 60 LEDs, which one is not bright, this LED has a problem, you can replace it.
1. The welding sequence is wrong. It is recommended to solder the LED lamp first, then solder the back component, solder the digital tube, and finally insert the chip.
2. LED lights pay attention to the positive and negative poles, long legs positive.
3. The chip notch and the base notch must be consistent with the notch identified on the board.
4. The buzzer pays attention to the positive and negative poles, the positive pole of the long leg, and the resistance value should be consistent with the identification on the board.
5. The triode should be inserted in the same shape as the board.
6. The digital tube pays attention to the direction, and the decimal point is below.
7. Power supply attention to the positive and negative poles, the power supply DC voltage is 5V.
8. Check for solder shorts and solder joints. This phenomenon is common.
9. If the display is abnormal or the time is not gone, remove the DS1302 and the button battery, then plug in the DS1302, do not insert the battery, and then power on, then put the battery after normal.
10. If the individual lights are not lit, check the solder shorts and solder joints of the unlit lights, check them well, and change the lights if they are not lit.
11. If the four digital tubes have the same segment code and are always on and bright, some LEDs are always on, because the electrostatic welding of one LED is damaged, resulting in a digital tube segment code and other LEDs sharing a single-chip pin with this lamp. Affected, the solution is to switch to the clock LED full light mode, observe 60 LEDs, which one is not bright, this LED has a problem, you can replace it.
Appendix: Specific identification methods for four-ring and five-ring color ring resistors
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