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Path: utzoo!watmath!clyde!burl!mgnetp!ihnp4!ihu1g!fish
From: fish@ihu1g.UUCP (Bob Fishell)
Newsgroups: net.bicycle
Subject: LOUD horn!
Message-ID: <421@ihu1g.UUCP>
Date: Mon, 11-Jun-84 15:17:11 EDT
Article-I.D.: ihu1g.421
Posted: Mon Jun 11 15:17:11 1984
Date-Received: Tue, 12-Jun-84 01:01:43 EDT
Organization: AT&T Bell Labs, Naperville, IL
Lines: 23

(oo)
I have a recipe for an electric horn that is at least as effective as a
freon horn and has the added advantages of being permanently installed
and not quickly exhausted.

Radio Hack sells "low current buzzers" in the 6-volt and 12-volt sizes.
Get TWO of the 6 volt ones.  Connect them in parallel.  Each of the 
buzzers has a tuning screw in the back.  Turn one of these to the right
so as to alter the pitch.

Connect these buzzers to TWO 9-volt batteries hooked up in series, so
as to provide an 18-volt supply to the buzzers via a pushbutton switch.
I mounted mine on the front reflector tongue; many other arrangements
are possible.  Battery life is more than a year (with alkalines).

This horn is extremely loud, loud enough to cause pain in the ears if
you're a couple of feet away and right in front of the diaphragms.
It's guaranteed to make joggers jump, even when they're blasting their
Walkmans at maximum volume, and can be heard inside any car.
-- 

                               Bob Fishell
                               ihnp4!ihu1g!fish