Hello, I have a schematic below of an IFR3205, I also have a picture of an empty pencil cap wrapped in magnet wire(5 OHMS).
I am attempting to make a rudimentary coil gun. I have just received my IRF3205 in the mail and I have hooked it up as shown in the schematic and I am powering the whole thing with my DC benchtop power supply and it lets me read the current it is drawing.
Pretty much when I hook up the coil to my power supply through JUST a pushbutton I am able to pull the full 5 AMPS from my power supply. But when I hook it up as shown in the schematic I am only able to pull 1.6 amps. I understand OHMS LAW- My coil is 5 OHMS and my power supply is 12v----- 12/5= 2.4 amps.
Why without the MOSFET circuit am I able to pull 5 AMPS and with the circuit only 1.6 amp?