Re: 12 volt horn?

On Mar 16, 9:51 pm, "Bruce W.1" <s...@xxxxxxxxxxxxxxxxx> wrote:
Andy M-S wrote:

Here's what you need:

http://www.amazon.com/Megalert-Mega-Horn-Electronic-Bicycle/dp/B000AO...

By the way, if you have 12 alkaline batteries in series, you have a 16-
volt system (at least when they're fresh) as standard alkaline
batteries are rated at 1.5v.

You'd be better off with a sealed lead acid (SLA) battery--they're
rechargeable, and capable of putting out more current. Check
availability atwww.allelectronics.com.

=====================================================

The Megalert is a good choice, but it is not weatherproof. I need a
weatherproof peizo horn.

The reason I'm using alkalines instead of a rechargeable is because
while touring I will not always have a chance to recharge them. But
there's always a place to buy alkalines.

My battery pack has a switch to connect 10 or 12 cells. For the first
10 minutes I will use 10 cells then kick-in the other two. This because
my HID headlight can't handle over 15.5 volts.

HIDs are nice, but given the weight of the battery pack you'll be
carrying around, plus the cost/waste of frequent replacement, not to
mention the space it takes up in your touring gear, have you
considered getting a hub generator system? A two-headlight system
puts out a lot of useful light, and though it's nowhere near as bright
as an HID, it works quite well. I've been commuting early and late
with a single Lumotec 3w head, and drivers think it's quite bright.
Plus I never run out of batteries, of course. I do have an LED
(Planet Bike) mounted to my helmet to use at stopsigns, etc...

If I were you, I'd try the Megalert and do a waterproofing test...most
electrical/electronic devices handle moisture better than you'd
think. Or for true waterproofness, the Air Zound, with the air bottle
tucked into the handlebar bag or a front pannier.

I have come to dislike relying on batteries in general...while the
Amesco you're looking at may be fine when the batteries are good and
it's the only load, how will it perform when your headlight is already
drawing the batteries down?

.

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