Aquarium Air Pump(aerator) Magnetic coil winding information

26 swg coil i have winded(tried 100 turns 50 turns,40 turn , 30, turns) in air pump bobbin and inserted into bobbin rod and placed in air pump magnet and 12 v 1.3Amps supply to coil but only one time vibrate started and stopped and when remove the supply and same process but
after some time started smoke has come and lot of heat has been generated can you have any idea about this problem.

1.why smoke is coming when giving 12 vol supply 26 swg coil 100 or 50 or 40 or even though 10 turn also tried with diffrent turns?
2. original winding setup is very very thin tiny coil having lot of turn i have replaced with 26 swg copper wire . in this setup it will work or not. if not work is there any additional setup need for this .


Please refer the picture bobbin and rod information in attachment file

Oh, where to begin.

You have replaced many, many turns of a very thin (i.e., high resistance) wire with a few turns of lower resistance wire. Just guessing, it looks like you've got a bobbin about an inch in diameter=> approximately 3.14 inch circumference. 100 turns would be about 314 inches (26 feet). 26AWG has a resistance of about 41 ohms per 1000 feet, so you've got about 1 ohms of resistance. You hooked this up to 12 volts, pumped 12 amps through that poor wire and then wonder why you had smoke? You should, instead, wonder why you didn't burn your house down. This is just basic ohms law. Maybe you should just go buy a new pump.