I am a newbie in electronics and this year I took some time to focus on it and learn the basics. I am trying to build possibly the most common raspberry pi bot… a battery, a couple of wheels + motors, a buck converter, a motor controller. I want to use a 9V battery with a buck converter (LM2596) and bring it down to 5V (to use it with the raspberry). I bought a few but turning the potentiometers do not seem to vary the output voltage. It is stuck at 8.3/8.5.
Can you give me any pointers about what could i try to make it work? Any help appreciated