Car horn on AC outlet...
MATTHEW L. JENSEN
require some sort of power adaptor. I believe that the horn (from a Ford
pickup, circa 1972) requires 12V DC at ~3 Amps. I could be wrong about the
Amps--I'd imagine it's just whatever most car horns draw.
I have tried quite a few stores, but none seem to carry the appropriate
adaptor. Radio Shack had a 12V 1 Amp model, but it didn't supply quite enough
power. It seems to me that someone *must* manufacture an AC-to-cigarette
lighter current adaptor, which would suffice, but I cannot find one.
Does anyone know where I can buy such an adaptor? (either AC-to-cigarette
lighter or AC-to-DC 12V, 3 Amps). If not, does anyone know how to, *gulp*,
make one?
Thank you,
--Matt
(mje...@linux.uwsuper.edu)
Sam Goldwasser
It will probably be tough to find a wall wart type adapter with this current
rating though some older home computers or video game machines may actually
have needed this much current.
Several options:
1. Get a catalog from a place like Jameco - they stock a wide selection
of surplus power supplies. Some of these would no doubt be suitable.
2. Build one from a 12 V 3 A transformer, rectifier, and filter capacitor.
You may need to regulate it to elminate 60/120 Hz hum.
3. Find a surplus PC power supply. There is a high current 12 V output
on all of these. You may need a couple amp load on the +5 to make it
work, however.
--- sam
Harry H Conover
: Several options:
: --- sam
Why not take the simple route? Go to Sears and buy an inexpensive
3 or 5 Amp battery charger. It should run the car horn just fine.
If the 60 Hz ripple is a problem, go to Radio Shack and but a
high capacitance capacitor (20 WVDC or so) to smooth the ripple.
Have fun!
Harry C.
P.Bennett
>I am trying to wire a car horn to a 110V AC outlet. Of course, this will
>require some sort of power adaptor. I believe that the horn (from a Ford
>pickup, circa 1972) requires 12V DC at ~3 Amps. I could be wrong about the
>Amps--I'd imagine it's just whatever most car horns draw.
>
>I have tried quite a few stores, but none seem to carry the appropriate
>adaptor. Radio Shack had a 12V 1 Amp model, but it didn't supply quite enough
>power.
For this power, you probably won't find a "wall-wart" type adaptor.
Radio Shack used to make a 3 amp 12 volt power supply, intended to power CB
radios, and the like - don't know if they still have them.
Ham radio stores will have higher power supplies which hams use to operate
"mobile" type radios at home.
Peter Bennett VE7CEI | Vessels shall be deemed to be in sight
Internet: ben...@triumf.ca | of one another only when one can be
Packet: ve7cei@ve7kit.#vanc.bc.ca | observed visually from the other
TRIUMF, Vancouver, B.C., Canada | ColRegs 3(k)
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CharlieH
Opinions are worth what you paid
... and these are mine, only mine!
Note: A Computer is only one tool, life requires many.
John Stroppel
gel-cell on a wall wart. Then draw short bursts of amps from the bat. ?
John
--
John Stroppel | Internet: jstr...@uhl.uiowa.edu
The University of Iowa - Hygienic Lab | Amateur Radio: WA0VYZ
Oakdale Research Campus, OH-M7A | Voice: (319) 335-4500
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