i am using lm317t voltage regulator and my rectifier gives 18 v after a filter capacitor
first time it gives perfect results but from second time in low resistance of 5k pot ,the pot is starting to burn ,and the lm317t is not working correctly until it is being replaced by another one.
i have used 5 lm371t chip and 5 5k pot again and again but it results same .
then i have replaced 5k pot with 1kohm resistance . the resistance is heated up in 2 or 3 seconds
there is no short circuit i have made.
r1 is 330 ohm
please tell me the solution
this image shows my config
first time it gives perfect results but from second time in low resistance of 5k pot ,the pot is starting to burn ,and the lm317t is not working correctly until it is being replaced by another one.
i have used 5 lm371t chip and 5 5k pot again and again but it results same .
then i have replaced 5k pot with 1kohm resistance . the resistance is heated up in 2 or 3 seconds
there is no short circuit i have made.
r1 is 330 ohm
please tell me the solution
this image shows my config
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