Re: LM317 exploding electro
- From: Eeyore <rabbitsfriendsandrelations@xxxxxxxxxxx>
- Date: Thu, 07 Dec 2006 11:46:53 +0000
John Morris wrote:
I know someone is going to make me feel stupid for asking this, but
...
I have built the standard LM317 PS circuit with variable pot, etc. on
a solderless proto board. Input is 37VDC from a plugpack.
It works fine for about 20 seconds, then the 10uf 63V electro in
parallel with the pot heats up and explodes.
I have checked the circuit a dozen times and cannot find a fault.
Can anyone offer a clue? I have heard some brands of LM317 have
differing pinouts.
I rather doubt that.
What's this *standard circuit* anyway ?
Have you made sure you have local decoupling for the regulator ?
Graham
.
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