oh more than move a compass needle. Hopefully be able to lift a small n52 magnet from an inch away.
Also how does the motor controller adjust speed? Does it limit the current or something? By adding resistance or something?
I actually just wound it up and managed to get 2000 turns haha way more than I expected. I don't have a multimeter with me to test its resistance but tomorrow I will. Its about diameter of iron core .2" diameter of electromagnet about 3/4" length 1"
Idk the length of the wire because idk how to measure that but I made a basic servo with uh the light reader whatever its called and counted once every turn and did 2000. I have 3 more to do but am going to wait until tomorrow when I measure the resistance. hopefully get around 13ohms and I can use a 11.1V battery with that if my maths correct. Else around 8.5ohms will work with the 7.4V battery.