[HomeBrew] Powering a laptop from 12 volts...

Thu, 4 Sep 2003 15:43:32 GMT

--- [email protected] wrote:

Close. I have a circuit at home that uses a 24 volt filament transformer. The oscillator works from the center tap to ground and the output is taken from the entire secondary (24 VAC). The primary is not used. I would add an adjustable voltage regulator to improve filtering and stability. Around $3 at Radio Shack.

Ed Richards K6UUZ

--- GreenTree Ground Station <[email protected]> wrote:

So if I'm on the same page here...

What one needs to do is oscillate the 12vdc to either
12 or 6vac at around 50-60 Hz, then feed it into the
secondary of the filament xfmr, then take the result
from the primary and regulate/rectify/filter that.

Correct ?

Can an oscillator be found that has the current capacity
to drive the transformer and produce a sufficient amperage
in the conditioned output ?  Where ?!

The only other suggestion I would have would be to locate
a 12VDC operable Laptop and use THAT mobile.  Less hassle.

73 - Bruce

On Wed, 3 Sep 2003 [email protected] wrote:

> What you need is a DC-to-DC converter. You can sometimes find one that
> will suit your needs or build your own, using a filament transformer.
> It is a low frequency oscillator stepped up to whatever voltage you
> need, then rectified and filtered. Good luck.