The issue is the design of LED electronic displayer. The electronic screen can display a variety of text or monochrome images, one can showone full-screen characters, four 8 x 8 dot matrix LED display module form a 16x16 dot matrix display module.
The cirtle is based on AT89C52 single-chip, by the chip to control four 74HC138 drive out to drive the display screen. Use Protel to design schematic, language of C for software programming.
The design uses a dynamic display, making graphics or text can stationary, moved out of the way and many other shows. Simple structure, low prices, a wide range of applications.
Keywords: LED , Electronic display , Supply chain management (SCM)