- #1
arydberg
- 244
- 31
I made a magnetic field detector. I used a small U shaped magnet transformer core and wound a coil on the bottom length. This was then mounted on a piece of one inch PVC plastic pipe. One red LED and one green led were then attached to the core. A opamp was used to amplify the signal from the core and drive the LEDs. Two 9 volt batteries were mounted in the pipe and the pipe was mounted in a 2 inch piece of PVC so it could be rotated with a electric motor.
The result was a spinning pipe that pointed north and south. As it can be used at any angle I found that it indicated a null and the LEDs went out when the pipe was parallel to the dip angle of the Earth's magnetic field.
I'm not sure what to do with it. Any ideas?
The result was a spinning pipe that pointed north and south. As it can be used at any angle I found that it indicated a null and the LEDs went out when the pipe was parallel to the dip angle of the Earth's magnetic field.
I'm not sure what to do with it. Any ideas?