Wrapping Your Own Transformers (was: Re: UPS Batteries (again))

[richard childers / kg6hac]

Wolfgang,

My brother could probably build a custom power supply that would do 
everything you want it to, for around $100 plus materials ... if you're 
interested, let me know.

Basically, transforming direct current is very similar to transferring 
power with gears. In the case of gears, you can adjust torque by varying 
the gear ratio. In the case of direct current, you adjust the voltage by 
varying the wire wrap ratio. Once you understand this, it is child's 
play to wrap cores to exactly the voltage desired.

And wire isn't that expensive; drop into Radio Shack and tell them you 
want to wrap a transformer, and if you find a knowledgeable salesperson, 
they will lead you directly to the coils of fine copper wire and you can 
see for yourself that it's not that expensive.

Regards,

-- richard

-- 

Richard Childers / Senior Engineer
Daemonized Networking Services
945 Taraval Street, #105
San Francisco, CA 94116 USA
[011.]1.415.759.5571
https://www.daemonized.com




Wolfgang S. Rupprecht wrote:

>jyetter at bluedogs.org (Joseph E. Yetter, Jr.) writes:
>  
>
>>BTW: I've put together my house's 24v solar system, with both
>>lead-acid and gel-cells. 
>>    
>>
>
>Have you found a good high-efficiency 24vdc-input ATX power supply yet
>or ar you going to run your computers from 120vac?  
>
>I've been hoping to find a good power supply that would allow me to
>run an ATX computer directly from a pile of lead acid cells kept in
>the crawl space.  The only one's I've been able to find are no-name
>brands that when they bother to tell you the efficiency at all, it is
>something downright awful like 60%-80%.
>
>-wolfgang
>  
>