Circuit Projects‎ > ‎

Bicycle Stereo and Horns (Older Project)

posted Mar 10, 2015, 12:36 AM by Neil Caulfield   [ updated Mar 13, 2015, 11:34 PM ]
Note: anything made prior to college is likely going to have a rather crude style of assembly, though I was quite resourceful with my limited allowance and access to transportation at the time.

Project time frame: Spring and Summer of 2009 and 2010
requirements: basic circuitry, soldering, knowledge of audio equipment

This project put a compact and permanently attached sound system and horn onto the back of a mountain bike. The purpose of this project was to create a bicycle perfect for group cruises at the beach,  and a safer alternative to wearing headphones. It was also a good project to experiment with resistors and LEDs attached to an audio channel.

The design stage involved moving around some components from a partially damaged Altec Lansing 5.1 channel speaker system. I ultimately came up with this 5 speaker cabinet made from the original subwoofer enclosure. The final designs excluded the center channel that would be mounted to the handlebars, but the resources available to me at the time did not provide an easy mounting solution. 

The entire system ran off of a single lead acid battery that was seated in the repurposed water bottle rack. The battery could be removed and charged with a standard automotive trickle charger. 

Early design:
Car horns were added the following year with a relay and switch. This was mainly used for show, and was not ideal for bike trail use as you could imagine. A standard bell was still equipped for such outings. 

Car horn demonstration:

The project has since been abandoned, though possible future plans for an adult-size high wattage stereo trike are a possibility.