Electromagnetic induction questions.
OK, this is another one of those questions I should know, but don't.
Mainly because I have never done it before, I have a whim to build an electromagnetic launcher, something table-mounted with a range of around 3-5m (10-15 feet). I'm not after launching nails through Coke cans.
I have been browsing the web, and the designs all seem to be much more complicated than is really necessary for toy.
The image below is a scan of my badly-drawn thoughts of how simple it should be.
- Have I got that right?
- I plan to use a bunch of capacitors harvested from dead electronics and connected in parallel. Is there a recommended total capacitance for such a device?
- If launching a ring, must the ring slide over the ferrous core, or would there be enough umph to launch a ring balanced just past the end of the core?