12v DC Unipolar to 16v DC Bipolar

[John E. Perkin]

Hello, my component level electronics is poor at best so please help
me.

I need to take 7v to 18v (ish) Bipolar DC, step it up to 16v DC
Unipolar.

I've got my power input sorted with a decent voltage regular and an
off the shelf DC to DC unit will get it up to around 18v/20v and I can
regulate that with a 16v fixed or adjustable regulator, but because my
electronics knowledge is so poor, I've no idea how to then make 16v
Unipolar to 16v Bipolar.

Output is around 0.2A

Please Help!

Thanks,
John

 

[default]

On Wed, 24 Mar 2010 07:11:08 -0700 (PDT), "John E. Perkin"
<john.e.perkin@googlemail.com> wrote:

Hello, my component level electronics is poor at best so please help
me.

I need to take 7v to 18v (ish) Bipolar DC, step it up to 16v DC
Unipolar.

Huh? Isn't that exactly opposite of what the title of your post says?

I've got my power input sorted with a decent voltage regular and an
off the shelf DC to DC unit will get it up to around 18v/20v and I can
regulate that with a 16v fixed or adjustable regulator, but because my
electronics knowledge is so poor, I've no idea how to then make 16v
Unipolar to 16v Bipolar.

Output is around 0.2A

Please Help!

I assume you want plus and minus supplies referenced to ground . . .

for something like working with op amps?

This is often done with a 555 timer connected as an astable
multivibrator to derive a square wave that can invert the polarity.

A search of = 555 voltage converter, yields a lot of info. . add
"-frequency" to weed out frequency to voltage converters.

http://www.aaroncake.net/circuits/vinvertr.asp

Many types of voltage converter circuits
http://www.electronicsteacher.com/list-of-schematics/v/voltage_converters.php
--

 

[John E. Perkin]

Many Thanks,

This has put me down the right route!.

Thanks,
John