I have some thick paper, a magnet, and small red led, and spoil of wire. The magnet is has diametre of 0.008m and height of 0.015m with strength of about 1.5 T i believe. The led i think need atleast 1.5 volts.

What equations do i need to figure out how much turns of the wire i need and the best size for the paper. I plan on coiling the wire around the thick paper and attach the 2nd ends of the wire to the led. I am not sure if that works.

 

This problem does not seem to be a simple "apply an equation" to get
design answers. Seems more like a numerical simulator is needed to
handle the geometries involved.

Anyone know of a field simulator that will handle induction problem as
well ?

Regards, Dana.

 

What equations do i need to figure out how much turns of the wire i need

There is no simple equation for this, as much depends on the geometry, but to maximise the coil output you would maximise the number of turns.

 

A quick simulator would be to put the magnet in the coil and shake it vigorously, recovering the peak voltage at various loads. From there you can get an idea of what to do next.

Check that 1.5T. that is about 30,000 times that of the earth's mean magnetic field.

 

Hello,

As @DickCappels said, check the 1.5T.
An 20 MHz NMR magnet is 0.47T and will weight about 80 to 120 kg, depending on the gap size.

Bertus

 

So many variables.

Start building one with a few hundred turns and try it!
You will learn things beyond any equation.

 

From remains of shake flashlight, wire = .11 mm, coil = 21 mm long, 19.2 mm ID, 20.8 mm OD, magnet 15 mm X 15 mm. White LED will flash for each magnet transit. Light failed when non rechargeable battery expired.