pt100三线测温电路，利用运放实现恒流源，三线连接pt100电阻，可以长距离测量温度。-pt100 circuit，for a long distension temperature sense。

利用pt100测温，开发环境为430,通过ad采样来测的外部温度并通过液晶显示来显示温度值。适合于初学者-Pt100 temperature use, development environment for 430, through ad sample to measure the external temperature and through the LCD to display the temperature value. Suitable for beginners

PT100计算公式_C程序,关于PT100测温的程序使用，以及计算和相关注意事项。(PT100 formula _C program, on the PT100 temperature measurement procedures, as well as calculation and related matters needing attention)