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 resistance algorithm, the software, the input voltage can be calculated resistor voltage input resistance can be calculated using easy