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Lt317 problems

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House91320:
I have a power supply that i built recently before the lt317 is 8 after the lt317 its 4 any one got any ideas.

alm:
Your schematic appears to have disappeared in thin air, so it's somewhat hard to debug. Dropping voltage is exactly what a linear regulator is supposed to do, so depending on what you connected to the adjust pins, this could be within spec.

House91320:
http://www.eleccircuit.com/lm317-lm338-lm350-current-regulator-calculator/ its this but the resistor is 1ohm

EEVblog:

--- Quote from: House91320 on May 29, 2011, 11:21:06 pm ---http://www.eleccircuit.com/lm317-lm338-lm350-current-regulator-calculator/ its this but the resistor is 1ohm

--- End quote ---

That's a constant current circuit, not a voltage regulator for a power supply.
I think you have the wrong circuit.
Try:
http://www.electronics-lab.com/articles/LM317/

Dave.

House91320:
i know i am using another regulator for the variable out put voltage and that works fine. I am using the 317 as the current regulation

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