A few months ago, my physics teacher asked my group to make a dynamo for a bicycle so that when you pedal the wheels, some small bulbs light up. A dynamo is a small generator made from a magnet that is rotated in the middle of coils of wire.
At first, I didn't think it was possible. We gave it a try but the wire we used was not thin enough.
However, it is possible. I fixed the problems and my bicycle dynamo produced voltage. It gave me great satisfaction and let me know that even though things might seem impossible, one can find a solution.
SAM
STFA Tam Pak Yu College
Thanks for your letter, Sam. And congratulations on your invention! Problem-solving can be very satisfying. What you did involved technical skills as well as the ability to think creatively. Well done.