手写绘图板的设计

Design of Handwritten Drawing Board

系统以ATmega128单片机为控制核心,设计电路并实现手写绘图板功能。包括控制电路、电压采集电路、放大电路、稳压源电路、显示电路等。当表笔接触镀铜板表面时,电压采集电路、放大电路能够采集到单片机能够识别的电压信号,通过单片机算法能够算出表笔点触镀铜板位置的坐标,并能够在显示电路中显示坐标,从而实现手写绘图板功能。

This system takes the mega128 single chip as the control core,circuit design and realize handwritten drawing board function.It includes a control circuit,a voltage sampling circuit,amplifying circuit,power source circuit,display circuit etc..When the pen contact plating copper surface,voltage acquisition circuit,amplifying circuit,can col ect the voltage signal microcon-trol er can identify,through the microcontrol er algorithm can coordinate calculated pen point contact plating copper position, and be able to coordinate display circuit displays,so as to realize the handwriting drawing board function.