Guitar version of running water lamp

By adding a type_c interface and using an external power supply to input power to the NE555, the capacitor in the NE555 will continue to charge and discharge, thereby forming a square wave signal at port 3. This signal is input to the clock interface of CD4017, causing the Q0~Q9 pins to appear high level respectively, thus making the corresponding LEDs brighten. The potentiometer changes the blinking degree of the LED by changing this frequency.

1. When connecting the circuit, you need to modify the line width in advance, otherwise problems may occur later.

2. When welding the circuit, you must judge the positive and negative poles, otherwise you will lose everything.

3. The use of different parts will cause different results. For example: the resistance of the connecting resistor is different, which will affect the brightness and frequency.

4. Practice makes perfect. Repeated welding will enhance your use of parts and machines. I recommend welding a few more times.