product detailed information: 100% brand new and high quality Made of high-quality materials, durable and practical Surface mount soldering practice chart with rotating LED circuit This project is aimed at new components for surface mount soldering. It can help you improve your skills in soldering resistors, capacitors, diodes and LEDs, transistors and IC chips. The kit includes an 85x54mm printed circuit board (PCB) and 126 surface mount electronic devices (SMD). A simple rotating light wheel project in the middle of the PCB gives you the opportunity to test your new learning skills. The areas on the left and right sides of the PCB are used to practice soldering skills, while the central area has a functional electronic item with sequential flashing colored LEDs. In the field of practice, you can use 78 components in four standard sizes ("1206", "0805", "0603" and "0402") to enhance the experience of surface mounting soldering. The board is compatible with surface mount soldering techniques using soldering irons and thin solder wires, solder paste and hot air repair stations and even professional reflow ovens. If you have no previous experience in soldering surface mount components, you can find many useful operating method videos online. Each column of components in the practice area is connected to the test pad at the bottom of the circuit board, so you can use a multimeter to check whether all connections are correct. If the project area of ​​the circuit board is soldered correctly, you will be rewarded with a rotating screen with 15 colorful LEDs! There are 48 components in the project. A detailed instruction sheet is provided in English. After welding, simply connect a battery between 4V and 12V or other DC voltage (not provided) to the power input pad to start the rotating hood. Please note that the color of the LED may be different from the color shown in the figure. Package Contents: 1 * DIY kit for electronic circuit board projects notes: 1. Due to many factors, such as the brightness of the display and the brightness of the light, the actual color of the item may be slightly different from the image displayed on the website. 2. Please allow a slight manual measurement deviation of the data. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia