4-bit Digital Electronic Clock Making Kit Teaching Training DIY Parts 51 Single Chip Microcomputer 4-bit Digital Tube Clock -77057

Product introduction:
This product is a 4-digit digital electronic clock. It is a DIY kit and needs to be welded and installed by yourself. It is suitable for electronic beginners, enthusiasts, and students to use in welding and assembly training.

Product parameters:
Power supply voltage: 4.5V-6V
Product size: 50mm×19mm
Microcontroller model: STC11F02

Instructions for use:
S1 reset button, S2 function button, S3 set number button.Turn on the power, the clock displays 0.00, the second flashes, and the timing starts.

Note:
1. There are various component logos printed on the PCB board, please solder against the logo;
2. The resistance has no direction, only the resistance value, please pay attention to the distinction when welding;
3. Polyester capacitors are not divided into positive and negative poles. Electrolytic capacitors, LED lights, and buzzers are divided into positive and negative poles. The long leg is positive (+), and the short leg is negative (-). Please pay attention to the marking direction on the PCB board when welding.;
4. The red wire is the positive pole (+), the black is the negative pole (-), and the green and white do not separate the positive and negative poles. Please pay attention to the distinction when welding to avoid wrong connections;