3D Colorful Christmas Tree Production Kit DIY Electronic Kit LED Running Light Flashing Electronic Component Fun Suite Soldering

PLEASE READ BEFORE PAYMENT!!!!
The products which are suitable for electronic enthusiasts to study and repair circuits. We only guarantee that the products are in good condition before delivery, and cannot guarantee 100% success after installation. The installation of the circuit requires the buyer to have experience in the circuit, please read the product description carefully before payment.
Battery not include in the package !
Parameters
Power supply voltage: 4.5-5V (DC power supply)
Board size: 58 * 58 * 113mm
Function Description
The circuit of the flash Christmas tree is mainly composed of a multivibrator circuit formed by three triodes. This circuit is highly successful and interesting, and is suitable for electronic enthusiasts to install and learn.
This kit has three circuit boards. During installation, pay attention to the insertion direction of LED and triode. The color of LED can be combined by itself. After insertion, the pin should be left about 6mm and bent parallel to the circuit board. When welding, grasp the welding time, and do not damage the LED due to too long welding time. Note that 30A.30B shall be correctly cross inserted after the components are welded, and then inserted on the base plate. When inserting, pay attention to the power polarity marked on the two plates of 30A.30B and the base plate, and then weld and fix them after they are correct.
After the installation is completed, power on to test the effect if no error is found. There are two options for power supply of this circuit, namely, three No. 5 batteries can be used for power supply. If no batteries are used, the circuit can also be powered by a mobile phone charger (5V) connected to a USB special line (optional).