Noob here, but attempting to build a current limiter with a LM317 for use with a power supply to give constant current.
I have placed an extra potentiometer (the white one) to simulate changing load conditions - but when I adjust it, I am getting changing amperage - which if the LM317 was working correctly, I'm pretty sure it should not.
For testing purposes, I have not placed the R1 resistor, or connected the third leg of the R2 potentiometer (don't think either of those are needed?)
What am I doing wrong?
Sourav Gupta
Joined February 12, 2018 696Monday at 02:11 PM
You need the R1. Moving the potentiometer to the end will short the Adjust leg with output.