Description

Matrix led displays shows numbers and alpha numeric characters. In addition to numbers, it displays scrolling texts and symbols programmed from the computer. Device communicated with RS485 half-duplex line only with 2 cables up to 1200m distance. It is designed with PIC microprocessor. 5×7 dot matrix led displays are used in the design. Firmware is written with C/C++ languages by me. Almost all hardware related libraries in firmware are written by me.