简易数字控制晶体管测试仪的设计∗

摘要

A simple and digital control transistor tester is designed,the system uses a single chip ATmega328p as the control core,and the voltages that are sampled through its internal three-way ADC are process by the CPU and display by the LCD1602 dot graphic LCD. The system software adopts C language and uses the modular program-ming ideas,which has the function of stability,high accuracy and easy extensions and so on. The system has a key measurement function,and can automatically identify diodes,transistors,resistors,capacitors and inductors,then en-ters the parameter measurement mode automatically after identification. Finally,the system displays the parameters corresponding to the type of measurement components and the components of the pin through the LCD.%设计了一个简易的数字控制晶体管测试仪系统，该系统采用单片机ATmega328p作为控制核心，通过其内部三路ADC分别采样电压后送CPU处理后，通过LCD1602点阵图形液晶显示。系统软件采用C语言利用模块化编程思想，它具有功能稳定，精确度较高和易于功能扩展等特点。该系统具备一键测量功能，能够自动识别二极管、三极管、电阻、电容和电感，识别后自动进入参数测量模式，最后将测量元器件的类型对应的管脚以及该元器件的相关参数通过液晶显示出来。