I need help with my homework; I figured that the engineering geniuses at CD would be good people to ask for help.
For one of my classes, I've been assigned to build a clock. To be honest, I have no idea how to do this...so I'm asking for any assistance that you can offer me.
The clock has to be able to keep track of time fairly accurately - within one second for a 30 second trial, and within two for a two minute trial. If I can get the clock to accurately measure three minutes as well, I get extra credit.
Problem is, there are a few catches...
1.) The clock can't make any use of electrical components
2.) The clock has to involve some form of periodic motion
Once the clock has been set into motion, I'm only allowed to touch it twice. The thirty second and two minute trials don't need to be measured during the same run; I can do thirty seconds first, reset, and do two minutes.
I'd like the clock to be unique; I've considered using one of those dipping birds but have no idea how to tie that into a timekeeping mechanism.
Any suggestions? The project is due on Friday, and I want to have some time to test it. Any help at all would be appreciated...
[edit]Slight clarification[/edit]