Each air horn is tuned to a specific note of the piano keyboard which, ... [Rick’s] cardboard floor plate switch and three 9 V batteries cleverly snapped together in series for a 27 V supply ...

Don’t forget, in the US at least, you can get a cheap air regulator and 125 psi 11 gallon portable air tank at Harbor Freight for your scare gags. Posted in how-to , Misc Hacks Tagged air horn ...

The factory horn just won’t do the trick if someone’s trying to get the attention of another vehicle that’s blasting 2,000 watts of country music. ... a pressure switch, DOT air line, ...