ebike horn

[cwah]

Hello there,

I'm thinking to get an 12V ebike horn to my bike as I've already have a DC DC adaptor:
http://www.amazon.co.uk/Air-Horn-Set-Dual-Tone/dp/B004KF1OTM/ref=lh_ni_t?ie=UTF8&psc=1&smid=A3NV6HLDD76AC2

What do you think of this model?

 

[Deleted member 4366]

They're great, but they take a lot of current. How much can your DC/DC converter give?

 

[pdarnett]

Think the current draw might be a lot for that horn. I'm waiting for this http://www.orpland.com/

 

[cwah]

I think my DC DC gives 6-7A current. Although it was advertised as 10A. So maybe 70-80W.

Isn't it enough?

 

[Deleted member 4366]

You'd be OK with one of them, but I'm not sure about two.

 

[103Alex1]

Can't you get one that'll run without a converter ? The current draw is not an issue then.

This one is 36V

http://www.ebay.co.uk/itm/DURITE-DISC-HORN-36-VOLT-36V-HIGH-TONE-91mm-DIAMETER-430Hz-STEEL-BODY-0-642-36-/300976656278

They come in 72V also ... maybe 48V too :

http://www.autoelectricalpartsuk.co.uk/products/Horns_and_Audible_Devices/Electric_Horns/Durite_72V_420Hz_High_Tone_064272.html

They are just as easily heard as a car horn for drivers without earphones in or the stereo on max. Mine works great when stuck behind cars who won't budge at a green light.

 

[cwah]

Yeah but I prefer to wire it to the 12v one as it's already present on my bike. It's also safer and cheaper.

What about this one?
http://www.ebay.co.uk/itm/Motorcycle-Motorbike-Horn-Universal-Mount-7cm-12V-100db-/271339687475?pt=UK_Motorcycle_Parts&hash=item3f2d1b0e33

 

[EddiePJ]

Clearly not what you were asking about, but I'm seeing these fitted to more and more bikes.

youtu.be/YYkBHGurj-I


http://www.cyclestore.co.uk/air_zound_3_bicycle_rechargeable_air_horn-ID_20723?gclid=COWW9-HR-bwCFaQfwwodtGUArw

.

 

[103Alex1]

Yeah but I prefer to wire it to the 12v one as it's already present on my bike. It's also safer and cheaper.

? If you connect without requiring a step-down converter it is surely safer as you are running at standard battery voltage. The amps drawn will always be far lower than trying to run a horn a 12V.

Cost difference I grant you.

 

[Geebee]

Drivers react to car horns because it sounds like a car, I have seen drivers totally ignore electric bike horns and even an air zounds.
But you sit along side a car and sound a decent car horn the driver will just about climb out the opposite window, I have seen this exact reaction

 

[103Alex1]

Those horns I linked are 112-114dB. The horn in my Kia is no louder and no bigger either (having looked under the bonnet !) ... and is similarly high tone. It's not an air-zound or an e-bike horn, it's a full-on vehicle horn.

 

[Deleted member 4366]

One thing to be careful off: Presumably, you are using your DC/DC converter for something else.. If it's just phone charging, noproblem, but if you use it for lights, so that you're already drawing several amps, the horn will push it over the maximum. One of those single horns should be OK on its own. I think I prefer Alex's solution, depending on your battery voltage. You can use batteries at a voltage different to the horn's nominal voltage. It only affects the pitch, so if you ran a 36v one at 72v, it would be an octave higher, or if you ran a 72v one at 60v, it would be a step lower.

 

[cwah]

I finally purchased the chinese one, as it only cost £2. Hope it's going to work. Will see