Re: stop battery from blowing up

Ken Williams wrote:

Also, are you using the voltage rating of the coil, or are you dumping a lot of overvoltage into it- i.e, are you using a 12 volt battery on a 3 volt coil?


I haven't actually made the coil yet. I was going to do like 2 layers of 14 AWG coil and pulse it once with a car battery. 12V would be fine I think.

If it is home made you then have no idea of the thermal properties of it However, for a single pulse then the equilibrium thermal properties are not an issue. If it is a quick pulse, then the max current for 14 gauge wire is the issue. Look that up. Then, figure out how much wire, given the resistance of the wire per foot, is needed to limit the total resistance so that 12 volts into that resistance gives just less than the max allowable current.
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