利用51单片机通过485总线发送控制信号给从机，控制交通灯的显示，倒计时等操作。-With 51 single-chip 485 sends control signals to the slave display, countdown operation, control traffic lights.

电视广播信号发射监测机 ADC,CAN,485,以太网-Television broadcast signal transmission Monitor

485地址通信模式,中断数据收发，控制液晶显示屏，带矩阵按键操作-485 address communication mode, the interrupt data transmission, controls the liquid crystal display with matrix key operation

1. 单片机为STM32F051 2. 485通讯式倒计时 3. 协议符合倒计时标准“GAT 508-2004 道路交通信号倒计时显示器”(1. MCU is STM32F051 2.485 communication countdown panel 3. agreement conforms to the countdown standard "GAT 508-2004 road traffic signal countdown display")