1. Home
  2. Hobby Electronics Basics
  3. Power supply

Power supply

I hope this isn't too dumb a question.

I have an IC that requires a +5 and -5 volt supply. My method would be to use a centre tapped 12v transformer, two rectifiers, a

7805 and a 7905 and a handful of capacitors in there somewhere. Is there a tidier method of getting this, maybe a voltage regulator designed for the job?

Guessing that this might be called a symmetrical power supply my googling has found this

formatting link
and this
formatting link

Reply to
Periproct
Loading thread data ...

"Periproct" schreef in bericht news: snipped-for-privacy@bt.com...

I'm not aware of a more simple solution. The only thing that may give problems is heat. I'd prefer a 2x8V or 2x9V transformer to reduce the heat to be dissipated in the regulators. It - of course - also depends on the required current.

petrus bitbyter

Reply to
petrus bitbyter

Try a +5 to -5 chip from a single +5 volt supply if the current requirement for the -5 V is not too high. Look at:

formatting link
Look at the MAX735. Dave

Reply to
CheapscateDave

If it works, don't fix it. :-)

If you use the "two-way symmetric" from

formatting link
, it should be spot-on, depending on the current and ripple requirements, of course.

Don't go with special/exotic chips unless it's intended as a learning exercise. :-)

Good Luck! Rich

Reply to
Rich Grise

I think I'll do that and bung a 7805 and 7905 on the end of it.

Thanks to all who replied. My apologies if I posted that question in the middle of another thread cos I can't see it unless I do a search for it. Regards, Nige

Reply to
Periproct

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.