As a bicycle commuter, I sometimes find myself riding in the dark. Even in a city, many streets are so poorly lit that cracks, potholes, unpainted speed bumps, and debris are serious hazards at night. LED lights are useful for alerting others of my presence, but they are much too dim to help me see. Serious bike headlights cost hundreds of dollars. I am not willing to spend so much, especially on something that can be broken or stolen. Fortunately, an effective lighting system can be made for under $100.
This instructable covers a very simple lighting system based on information from http://bicyclelighting.com
by Steven M. Scharf. For simplicity, many details are left out of this instructable. For such details, including charts for selecting lights and batteries, more complicated circuitry, and product recommendations, see http://bicyclelighting.com
The total cost of the particular system shown here, including Altoids gum, window wipes, and battery charger, is about $60. The battery charger can be used for other things, and some of the materials will have leftovers for other projects. This means that two complete lighting systems like the one shown here can be made for under $100.
This project involves electricity and heat. Do be careful now.