手写绘图板的设计  

Design of Handwritten Drawing Board

作　　者：毛文勇[1] 邵尊锋 李洋[1] 朱莉[1] 

机构地区：[1]衢州学院电气与信息工程学院,浙江衢州324000

出　　处：《工业控制计算机》2014年第6期144-145,共2页Industrial Control Computer

摘　　要：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.

关 键 词：ATMEGA128单片机 电压采集 显示 坐标 手写绘图 

分 类 号：TP368.12[自动化与计算机技术—计算机系统结构]