Riding a bicycle at night can be dangerous for both cars and cyclists due to poor visibility in the dark.Electronics blogger Jenna DeBoisblanc shows off how to build a system that includes turn signals, a strobe light, speedometer and brake lights to keep you safe.
The entire system is built on the backbone of an Arduino Uno with a few other parts totalling about $US150. That seems expensive, but DeBoisblanc's build covers a lot of ground. You not only get safety-centric features like turn signals and brake lights, you also get a handy speedometer and odometer so you always know how far you travelled. You can find the full guide, including videos, schematics and code over on DeBoisblanc's blog.