My Bike Car Horn By liseman in OutsideBikes6,05142Introduction: My Bike Car HornBy lisemanluke isemanFollow More by the author: About: bicycles, gardening, and other important stuff More About liseman » This is my bike sound and light system, based off of a $15 'ooga horn' meant for use on a car. It sounds best when overclocked to 18 volts (vs. 12). Video with sound here.