nuckolls.bob(at)aeroelect
Guest
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 Posted: Wed Jun 22, 2011 3:50 pm Post subject: OT: will a cap help here, horn that uses lots of amps? |
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At 05:51 PM 6/22/2011, you wrote:
| Quote: | --> AeroElectric-List message posted by: David <ainut(at)knology.net>
I bought an aftermarket horn for my wife's motorcycle that blows 10 amp fuses when you use it. Can I put a capacitor in front of it to keep the fuse from blowing? How do I calculate the size of cap to use? |
Horns are, in general, 'robust' devices. It's not
uncommon for automobiles to use relays to
put a firewall between the relatively low current
horn button and the noisy beast(s) under the
hood. Some parts stores offer devices called
"horn relays" . . . in fact, these are simply
high current rated relays that can be used for
any similar control task.
http://tinyurl.com/64xls33
Suggest you go with 20A fuse, 14AWG wire and
add a relay like so
[img]cid:7.1.0.9.0.20110622183910.01db67d0(at)aeroelectric.com.0[/img]
Yeah, 20A is a lot of snort and the horn is probably
really loud . . . but it's an intermittent duty
system that requires less total energy to run than your
tail light.
Bob . . .
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