I need a power source 48vcc

Four car batteries in series would do nicely. Correct fuse is strongly recommended.

Somebody can post schemes and a components list to make a power source

You don't know how to do it yourself ? Whilst people here are helpful it isn't a place to just ask for someone to do the work for you !

You haven't even mentioned amperage ( 10mA or 100A ! ) or ripple and noise.

Is this for audio ? ( 48V is a typical 'phantom power' voltage )

Graham

That's a really dumb idea. He should use five 9V's and two AAA cells. This way he doesn't have to buy four cars.

Bob

Try the local phone company.

LOL!!

Dani,

I don't know what your current and power needs are, or what your budget and time span are, so my suggestion is that you buy one rather than getting the transformer, designing the rectification and filtering stages, etc. You can do a search for "48 volt power supply" and one of the responses will be:

Dave,

and which end is positive? I cant be bothered to get the meter out

martin

Opinions are like assholes -- everyone has one

--- If you have a treadmill with an AC motor, why not substitute a DC motor for it and use it like a generator?

Or maybe hook a turbine driving an alternator/generator to your kitche sink?

Or build yourself a REALLY BIG squirrel exercise wheel?...

-- John Fields

Why restrict the amount of pretty Colours that can be made with such a supply and a simple slipped screwdriver or finger ring?

You are both wrong. In one case he has to buy 4 things. In the other he has to by 5 things when the battery in just one railway shunt engine would do the job.

"Pooh Bear" a écrit dans le message de news: snipped-for-privacy@hotmail.com...

In case the OP doesn't mind a bit of ripple/noise and a moderate impedance, he can try the phone line.

Well, I guess I have to add the big :-) for him, now.

or a Van de Graff generator, and a step down thingummy?

martin

Opinions are like assholes -- everyone has one

And you get the voltage regulation by tempting it more or less with your REALLY BIG NUTS?

Oh my ! You just reminded me of something.

On one of my trips to Bombay or Mumbai as is now preferred, we were being driven back to our hotel but the traffic was moving slowly and there seemed to be some kind of fireworks display up ahead.

When we got to the location we saw that a power pole with a down-drop had somehow been damaged and the armoured cable was snaking about - making intermittent connections and creating a fabulous light show in the process. Mainly a kind of eery purple light actually. *Most* impressive !

Graham

In "them parts" often these events are caused by improvised Do-It-Yourself connections to *Live* wires running past the houses; sometimes the mess of non-standard wiring looks like real wines overgrowing the utility poles.

It is amazing the there, apparantly, are no major fires and electrocutions.

source

strongly

seemed

process.

I spent several years on a Pacific island. One stormy night I got a call from a concerned villager that "blue light was coming out of the ground". Needless to say inspection (from a safe distance) ascertained that the underground 11kV supply cable had been pierced by the coral and an

Ken