All you need are two diodes, a sounder and a few bits of wire.
Fancy sounder...

I'll cough that electrics are my thing, but it's not that complicated to do.

(Surprised Graham didn't go with this one).

Last edited by Martyn Culling; 05/07/15 03:03 PM. Reason: added a bit

1930 Super Sports Aero 'The Elk'