Magnetic Compass

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Magnetic Compass



Order Code: 78-1088
Manufacturer: TruSens
Manufacturer Part No: CMPS03
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1+£25.27
3+£23.40
6+£22.33
ROHS Exempt
ROHS Exempt





 
Key Features

Data Sheets

 
Compass Sensor, This Compass Module has been Specifically Designed for Use in Robots as an Aid to Navigation, The Aim Was to Produce a Unique Number to Represent the Direction the Robot is Facing, 5V Working Voltage, 20mA Current, 0.1° Resolution, I2C Interface
  • Produces a unique number to represent an orientational direction
  • Two Philips KMZ512 magnetic field sensors (which are sensitive enough to detect the Earth's magnetic field) are mounted at right angles to compute the direction of the horizontal component of the Earth's magnetic field
  • The output bearing can be obtained from a PWM signal on pin 4 or via the I²C bus on pins 2 and 3
  • The PWM signal is a pulse width modulated signal with the positive width of the pulse representing the angle
  • The pulse width varies from 1ms (0°) to 36.99ms (359.9°) – that is 100µs/° with a +1ms offset
Technical Datasheet IconTechnical Specification

Technical Specification

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Voltage requirements5V DC
Current20mA typical
Resolution0.1°
Accuracy3-4° approx, after calibration
Ouptut 1Timing pulse 1ms to 37ms in 0.1ms increments
Output 2I2C interface, 0-255 and 0-3599, SCL speed up to 1MHz
Dimensions32 x 35mm

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Reviewed by: SS | Product code: 78-1088
22nd July 2010

Works well; I am quite new to electronics but got it working on a Picaxe microcontroller in about 30 minutes. This was my first ever I2C project too. I have seen cheaper units out there, but am not sure if they would work as well. This unit has to be kept flat to work, some higher spec ones can compensate for being tilted and remain accurate.



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