本软件是在制作调电压电路时，最常使用的LM317作为调压芯片，但常常记不住317电压与电阻的算法，通过此软件，输入电压可以求出电阻，输入电阻可以算出电压，使用很方便-The software is in the production of offset voltage circuit, the most commonly used as a voltage regulator LM317 chip, but often can not remember the 317 voltage and r