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Additional projects / Sensors & electronics
Compass magnetic-field indicator
An adjustable magnet and compass used as a simple analog field indicator.
Open the numbered review →Compass, magnet, and coil
Photos 354–356
Photo 354 ·
Using a compass as a field indicatorA simple magnetic-field indicator built around a compass and an adjustable magnet. I experimented with offsetting Earth's influence on the needle so nearby magnets would produce visible deflections. It worked as a rough analog indicator.
Photo 355 ·
The compass and adjustable magnetAnother view of the compass-based field indicator, showing the arrangement used to change the magnet's position relative to the needle.
Photo 356 ·
An additional coil in the compass experimentThe compass setup with a large oval copper coil. I no longer recall the coil's exact role; it may have been used to offset Earth's magnetic field near the compass.