Guitar board running light

In this activity organized by Hebei University Science and Technology Innovation Association, I learned to use Lichuang EDA to design schematics and PCBs, and was able to operate them manually to create a physical object by myself.

The running water lamp manufactured this time uses NE555 and CD4017, which realizes the function of achieving the running water lamp effect without programming and relying only on the circuit. When NE555 is powered, it can send out square wave pulse signals. These signals control the counter CD4017. Run it so that it outputs high level from 0 to 9 in sequence, controls the flashing of the LED, and loops continuously. In addition, by changing the ratio of the two resistors and changing the charging and discharging time of the capacitor, the frequency of LED flashing can be controlled.

In the process of using Lichuang EDA, I found that this software is easy to get started and very convenient to use. During the welding process, some lights may not light up. After the seniors helped check, they found that some solder joints were not completely welded, and some polar components were in the opposite direction. Under the guidance of the seniors, Mastered the welding skills and finally achieved the desired results.