lm317t

Hello. I have a very frustrating problem. Im using the lm317 voltage regulator to add adjustability to a fixed output power supply. I have used the lm317 numerous times over the years and never had or seen this problem. I have used regulators from 3 different sources, checked and...

Hello all, This is my first post so forgive me if I break any rules, I am trying to create a variable voltage power supply using an lm317 but am running into problems. For starters, it doesn't seem that I have a vref voltage, when probed I get 0 volts across input and adjust. My second problem...

I've got a bunch of these and they all behave in the same way, so I'm doing something wrong. I'm using the output calc and schematic here: https://circuitdigest.com/calculators/lm317-resistor-voltage-calculator I'm trying to get it to near it's minimum so for R1 and R2 I'm using the same value...