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power supply help

power supply help

‎12-01-2010 08:32 AM

Hey guys,

 

Desigining a small power supply, variable with an lm 317t. I haven't done this since high school

so I was hoping someone could just look over the circuit for me? It seems to work I just

want to make sure I didn't miss anything or if there are any improvements I can make.
Thanks!

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Re: power supply help

‎12-02-2010 07:35 AM

I would re-arrange the AC input as follows:

 

AC Hot -> fuse -> Switch -> transformer in -> transformer out -> AC Neutral.

 

For simulation, maybe change the AC frequency to 60 Hz and the amplitude to 162.6 Vpk.  This will give you 115 V RMS (which I assume you are actually looking for.

 

You may want to also re-evaluate your LED current limit resistor based on the changes above.

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