This sensor provides eight directions of heading information by measuring the earth's magnetic field using hall-effect technology. The 1490 sensor is internally designed to respond to directional change similar to a liquid filled compass. It will return to the indicated direction from a 90 degree displacement in approximately 2.5 seconds with no overswing. The 1490 can operate tilted up to 12 degrees with acceptable error. It is easily interfaced to digital circuitry and microprocessors using only pull-up resistors.
| Power | 5-18 volts DC @ 30 ma |
| Outputs | Open collector NPN, sink 25 ma per direction |
| Weight | 2.25 grams |
| Size | 12.7 mm diameter, 16 mm tall |
| Pins | 3 pins on 4 sides on .050 centers |
| Temp | -20 to +85 degrees C |