PILGRIMAGE

1490 Digital Compass Sensor (website: www.dinsmoresensors.com)
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. Quick description of how to use the Dinsmore 1490 Sensor in a Circuit: The sensor has 12 pins arranged in four lines of 3 pins. Each set of pins corresponds with one of the primary compass points (N, S, E, W). Pin 1 of each set is wired to Vcc (usually +5v). Pin 2 is wired to Ground. And pin 3 provides the output signal. See the sensor data sheet for illustrations and further details. Since the compass sensor uses the Earth’s magnetic field to sense direction, it’s very important to mount the sensor away from motors and speakers – preferably high above them. We suggest building a mast of 4”-12” tall to mount the compass. The mast can be built using aluminum plates and L brackets from a hardware store, or plastic from discarded toys. Minimize the number of steel nuts and screws that are near the sensor.

Specifications:
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

1525 Analog Compass Sensor
This sensor provides a ratiometric output on two channels. The outputs swing from 2.9v to 2.1v in a sine/cosine fashion. It will return to the indicated direction from a 90 degree displacement in approximately 2.5 seconds with no overswing.

Specifications:
Power:5-volts DC @ 19 ma. Since rise time is only 90 nanoseconds, input current may be pulsed to save power.
Outputs: Dual analog channels, 2.5v ± 0.4v swing (total voltage swing rail to rail, aprox. .75v), 4ma DC signal. May feed direct to A-D front end of microprocessor.
Weight: 2.25 grams
Size: 12.7 mm diameter, 16 mm tall
Pins: 3 pins on 2 sides on .050 centers
Temp: -20 to +85 degrees C

(Kompasssensor)