64 LED SMD Dot Matrix Advertising Screen Welding Practice Kit 0-9 Digital Display Fun DIY Electronic Kit Soldering Practice

This kit consists of 64 0805 chip LED display units, which can display any character of 64 pixels, such as numbers, using a row and column scanning method. The kit comes with a microcontroller that has already burned the program. The boot display method is: vertical line by line lighting up → full screen lighting up and flashing twice → horizontal line by line lighting up → countdown display of 9-0 character advertisements in sequence. Then repeat the above display content. If you want to change the display content, you can connect the control signal from interface JP1 without soldering the attached microcontroller, and any content can be displayed. The circuit includes 64 SMD LEDs, 8 row drive transistors, 8 current limiting resistors, 2 serial expansion chips, 1 microcontroller chip, 1 SMD electrolytic capacitor, and 4 SMD high-frequency capacitors, totaling 88 components and 202 solder joints.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.