ahmelsayed
New Member
I'm using LM317 IC with a transformer 24V at 2A the IC is connected to 5Kohm POT to use it to vary output voltage between 1.2V - 30V
this is the circuit:
**broken link removed**
and i add a diode in parallel with R2 as i read in IC datasheet for protection .
the problem :
when i test it , the 5Kohm exploded and i get 33.5V DC output so i turn the power off the output supposed to get0 output . no it count down from 33.5 to 1 V in 45 sec . i don't know where is the problem .
so please some one put me on the right way.
this is the circuit:
**broken link removed**
and i add a diode in parallel with R2 as i read in IC datasheet for protection .
the problem :
when i test it , the 5Kohm exploded and i get 33.5V DC output so i turn the power off the output supposed to get0 output . no it count down from 33.5 to 1 V in 45 sec . i don't know where is the problem .
so please some one put me on the right way.