A simple passive speaker for your bicycle using the parts you have lying around. Loud enough to hear on quiet roads. A person with very basic soldering skills should be able to do this; doesn't require any advanced electronics knowhow.
I made this because getting up those hills can be easier with some tunes, and I didn't have the cash to buy one of the commercial ones. I really liked this too because it recycled things that weren't being used anyway - go green!
Step 1: Materials Needed:
This instructable describes how I made my bike speaker. It's intended to give ideas for others to modify for their tastes/materials. It just uses what I had around and available; thanks to my friend Chris who donated the speakers that were just lying around.
Passive computer speakers (or active, but my available speakers were passive). The ones I used were branded Creative, and they were made by Cambridge Soundworks, so they were good quality. This helps.
Screwdriver - mine required Philips Head
Cassette tape case
Glue gun (or sewing implements, if preferred)
Mesh/screen to protect speaker
Step 2: Speaker removal & connection
Open up the case of one of the speakers. As you can see by the photo, the wire ran through a small hole. In order to keep the wire intact, I cut it right where the two parts of the stripped wire were soldered to the speaker, then pulled it through. Remember which wire was connected where! Remove the speaker from the front of the box (I just had to unscrew it).