It should be grateful that spending your time in my post. I’m so glad to be here to show my project to you and now I need your help.
The following circuit is designed to convert 15V into 10V by using LM317. When the circuit board didn’t be finished ,R1=240 while R2=1800 .It’s normal. However,when all of them was wielded. The input and output are wrong.In the beginning,it can input 15V by using adjustable direct current and the current arrived 700mA.
Next,I adjusted it again,but now the input can just be adjusted to 12V while the output is 7V.
I am confusing about that what's wrong? How to solve it?
Your help will be appreciated.