How to get 12 volts from a Cessna 310?

Tim Hickey wrote:

Thanks for the input, everybody, and Kyler is mostly right. We want to
end up with a 12 volt power source. We think that the cigar lighter
outlet, even though it is mounted in a machine that has a 24 volt
electrical system, is at 12 volts. But it gets those 12 volts by
running the current through a load dropping resister. This makes a
lot of heat, or so the owner tells me, and we wonder if anyone else
has worked around this.

Thanks again for all input.

I rewired our C152 outlet to the voltage converters output. Even though
the Lowrance Airmap 1000 supports upto 28v input. We didn't have the
dropping resistor, input to the outlet was 24v...

"Darrel Toepfer" wrote

I rewired our C152 outlet to the voltage converters output. Even though
the Lowrance Airmap 1000 supports upto 28v input. We didn't have the
dropping resistor, input to the outlet was 24v...

I'm admitting that I'm not the world's best when it comes to those
electrons, all running around helter skelter, but I thought a dropping
resistor only worked with a certain sized (constant) load. If you checked
voltage at the plug with a volt meter, you would come out with 24 volts; if
you checked it with the lighter going, you would come up with 12 volts.
Right?

That being the case, you have to use a converter, or a regulator, or
something. I don't know. Anybody?
--
Jim in NC

Morgans wrote:

I'm admitting that I'm not the world's best when it comes to those
electrons, all running around helter skelter, but I thought a dropping
resistor only worked with a certain sized (constant) load. If you checked
voltage at the plug with a volt meter, you would come out with 24 volts; if
you checked it with the lighter going, you would come up with 12 volts.
Right?

That being the case, you have to use a converter, or a regulator, or
something. I don't know. Anybody?

You're limiting the current to what the lighter could digest...

Undo the lighter power, wire that to the voltage converter input, wire
the output of the voltage converter to the lighter input. Remove the
dropping resistor from the circuit, whereever its located. The panel
breaker should already be sufficient to supply power for its new role...

If its a certified airframe, get your mechanic to sign it off...

"Morgans" wrote in message
...


I'm admitting that I'm not the world's best when it comes to those
electrons, all running around helter skelter,

Me neither, but I've got a lot of people hoodwinked...


but I thought a dropping
resistor only worked with a certain sized (constant) load. If you checked
voltage at the plug with a volt meter, you would come out with 24 volts;
if
you checked it with the lighter going, you would come up with 12 volts.
Right?

Absolutely correct.



That being the case, you have to use a converter, or a regulator, or
something. I don't know. Anybody?

With switching regulators now coming into the market about as simple to use
as bait, I'm going to run a two or three parter in Kitplanes on how to build
simple switchers to go UP or DOWN.

Jim