Vibration alert in mobile phones is accomplished with a small but powerful electric motor that spins a small asymmetrical weight. In the picture below the motor is the "horizontal cylinder", while a 50 €cent coin gives an idea of actual size. The third object is a 1F 5V supercapacitor.
Small motor, 1F 5V supercap and a 50 €cent coin.
What do these have to do in my blog? Well, I bought two rubber band powered airplanes as a gift, and as soon as I saw them flying I immediately wanted to "improve" them with a longer flight time. How? My idea is to use the small motor and the supercap. The total weight is about 5 grams and the motor runs longer than 10 seconds off the supercapacitor. I need to figure out a way to easily power the motor after launch: a normally closed tactile switch could be handy.
Nevertheless, a bigger challenge is how to connect the motor to the propeller...
Questions? Contact me via mycall at yahoo.com. You should know what "mycall" is...
If you happen to hold presentations, whether in front of a large audience or a Club group of people, spice up your speech using a Prezi-based slideshow.
If your files are spread across several computers, even on different operating systems (Win, Lin, Mac), you might appreciate the free service offered by Dropbox. And if you decide to sign up for the initial 2GB space, please consider using my referral link so that we both get a free upgrade (+250MB).