This circuit is an innovative design for dynamic electronics. After being powered on, a circular five pointed star pattern consisting of 80 LEDs is formed. After turning on, the circuit lights up in sequence, and then flashes multiple times with full brightness. Finally, multiple patterns are presented in sequence, such as an inner edge less shape, an outer five pointed star, a regular five pointed star, a circle, and a circular five pointed star. S2 to adjust the speed. The products which are suitable for electronic enthusiasts to study and repair circuits. The installation of the circuit requires the buyer to have experience in the circuit. Note: This is DIY kit, not a finished product. You need to solder it yourself. Installation precautions: All light-emitting diodes and microcontrollers have polarity components. Be careful not to install them upside down. If you need other color effects, just replace the LED. Introduction to Circuit Principles 80 LEDs are connected to a dedicated microcontroller DX158 through a combination of rows and columns, and are scanned and driven to light up in the desired way through the microcontroller program. The microcontroller program in this kit has been burned and welded to produce the desired effect. DC1 is small DC socket, It can be powered by 4-5V DC, and can be powered by any 5V charging head. ( 5V charging head Not included). S1 is the power switch, and C1 is the backup filter capacitor. It is generally not installed and is not provided in the kit, which does not affect the effectiveness of use. Color: Green Material: PCB Package Contents: 1* DIY kit 1* Power cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.