Measuring the absolute pressure of
the environment using a digital barometer such as this has some interesting
applications. By converting the pressure measured into altitude, you have a
reliable sensor for determining the height of your robot, plane or projectile!
Using a sensor as capable as the
BMP180 you can achieve accuracy of 1m, with noise of only 17cm in ultra high
resolution noise. The device will operate at only 0.3uA meaning low current
draw for battery powered applications.
The BMP180 comes fully calibrated
and ready to use. As the device operates over I2C we've added optional I2C pull
ups that can be enabled using the PU (pull up) jumper on the board for your
convenience and ease during bread boarding.
Using I2C, the device provides
pressure and temperature as 16bit values, which are used along with calibration
data within the device are used to provide a temperature compensated altitude
calculation.
Features:
1.8V to 3.6V Supply Voltage
Low power consumption - 0.5uA at 1Hz
I2C interface
Max I2C Speed: 3.5Mhz
Very low noise - up to 0.02hPa (17cm)
Full calibrated
Pressure Range: 300hPa to 1100hPa (+9000m to -500m)
Weight: 1.18g
Size: 21mm x 18mm
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