I guess it is a perenial question. I need to wind some coils. Am I going to produce stronger magnetic field if I use lots of thinnest wire where many strands in the same section carry small current many times over. Or am I going to get a stronger magnetic field if I just use one single thick wire that can carry a huge amperage?
So you'll need a laminated core then.
Guys, thanks for all the input.Because everything is inter-dependant I don't yet know what my parameters are. But broadly speaking: - DC or AC: Its both, AC with DC offset. AC's frequency broadly from 1,000Hz to 10,000Hz. DC offset not more than 5 V DC. Most likely DC offset 1.0..2.0V DC. AC amplitude, say 2.0V AC peak-to-peak.- Voltage - possibly I need two solutions: 1) 2x AA battery, so V= 2x 1.2 = 2.4V DC @ about Imax < 1.0A, 2) LiPo battery, so V= 7.4V DC @ Imax < 6.0A- transformer or electromagnet? Hmmmm, something in between ;-) I need to bring magnetic field to certain level quickly hold it and drop it. And so on 1,000 to say 5,000 times per second.