The US1881 is an integrated Hall effect latched sensor. That’s nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A hall effect sensor is much smaller, but can handle less current than a reed switch.
The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output...
This is the Magnetic Door Switch Set, a small reed switch assembly specifically designed to alert you when doors, drawers, or any other aperture opens. These types of switches are primarily used in home security systems. One half of the assembly set on a window or door frame and the other attached to the window or door itself. When the switch set is separated from each other the contact is broken and triggers an alarm.
When each magnet piece comes within 20mm of each other they complete the circuit with the internal reed switches. Each Magnetic Door Switch set can accept a max voltage of up..
The HMC6343 is a fully integrated high end electronic compass module that can compute and give you a heading direction that’s accurate within a couple degrees. It is tilt compensated and is calibrated to handle magnetic distortions. This breakout board allows for easy use of the HMC6343. All that is required is power and I2C connections to a microcontroller so that the module can receive commands and send data back to the user.
The IC combines 3-axis magneto-resistive sensors and 3-axis MEMS accelerometers, analog and digital support circuits, a microprocessor and algorithms in firmware requi..
Freescale’s MAG3110 is a small, low-power, digital 3-axis magnetometer. The device can be used in conjunction with a 3-axis accelerometer to produce orientation independent accurate compass heading information. It features a standard I2C serial interface output and smart embedded functions. It’s also a tiny QFN package which isn’t very easy to play with so here is our easy to use breakout board. This board breaks out all of the pins for the MAG3110 to a standard 0.1" header and also supplies the necessary filtering capacitors so that you can easily use it in your next navigation project.
This is a very simple breakout board for the popular HMC6352. Remember the KISS mantra? We really enjoy the simplicity and ease of use with the HMC6352. If you need simple, clean, degree resolution compass heading, this is the way to go.
Simple I2C interface
2.7 to 5.2V supply range
1 to 20Hz selectable update rate
True drop-in solution
0.5 degree heading resolution
1 degree repeatability
Supply current : 1mA @ 3V
Honeywell Product Page
Example I2C project
Example project in Portuguese - Thanks Tiago!
Digital Compass How-..
The LSM303DLMTR is a triple axis accelerometer combined with a triple axis magnetic sensor. This arrangement allows for the LSM303 to perform 6D orientation detection. This breakout board uses the LSM303DLMTR to give you all the data you need to feed into a microcontroller and calculate tilt-compensated output!
+- 2/4/8 g dynamically selectable full-scale
+-1.3 to +- 8.1 Gauss magnetic field full-scale
16-bit data out
Description: PNI Corp's 3-axis magnetometer. Ready for the big time? Low noise, large resolution magnetic field sensing all packed into a user-friendly DIP module at your disposal. Stable over a wide temperature range, the MicroMag3 is a must have for orientation sensing and navigation.
500uA @ 3.3V DC
Field measurement range +/-1100uT
Resolution as low as 0.015uT
SPI interface - no additional circuitry needed
MicroMag3 Data Sheet
CommBoard Users Guide
This is a breakout board for Honeywell’s HMC5883L, a 3-axis digital compass. Communication with the HMC5883L is simple and all done through an I2C interface. There is no on-board regulator, so a regulated voltage of 2.16-3.6VDC should be supplied.
The breakout board includes the HMC5883L sensor and all filtering capacitors as shown. The power and 2-wire interface pins are all broken out to a 0.1" pitch header.
Simple I2C interface
2.16-3.6VDC supply range
Low current draw
5 milli-gauss resolution
Dimensions: 0.7x0.7" (17.78x17.78mm)
Freescale’s MAG3110 is a small, low-power, digital 3-axis magnetometer. The device can be used in conjunction with a 3-axis accelerometer to produce orientation independent accurate compass heading information. It features a standard I2C serial interface output and smart embedded functions. It’s also a tiny QFN package which isn’t very easy to play with so here is our easy to use breakout board. This board breaks out all of the pins for the MAG3110FCR1 to a standard 0.1" header and also supplies the necessary filtering capacitors so that you can easily use it in your next navigation project.