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Tuesday, April 3, 2012

Using a microcontroller and sensor to calculate air pressure

By Ian Harris


Assorted methodologies are available for interfacing a micro-controller to an air pressure sensor. This allows you to employ a micro-controller to read from an input, perform diverse processing and view the ensuing output.

You may carry out the software routine on the micro-controller by using your device's flash memory. As far as the pressure sensor is concerned, the force that exerted per unit area is expressed as pounds per square in. or PSI. The pressure sensor should be calibrated to recognize ranges in pressure that are found in a barometer module. You can use a pressure sensor with a micro-controller to measure barometric pressure.

The pressure sensor and micro-controller are powered by a power supply. The power supply for the device will have a voltage that might be at 5 volts, but is dependent on the components that you use. To best understand the connection between the sensor and the microcontroller, to do this you want to interface the 2 components by utilizing a diagram or a schematic. A value read from the pressure sensor is shown on an LCD display or transmitted to a PC.

You can attach this sensor to your personal computer system with the right kind of connection. This may usually be a USB cable or a serial connection. An external case is usually used to contain the micro and your pressure sensor. Interfacing these elements is a hobby to pursue if you've got an interest with electronic devices

Often this kind of device is used to work out the pressure from by measuring a voltage level, although modules available these days sometimes the pressure is available as a digital signal. When you're interfacing an air pressure sensor to the micro-controller make sure that your pressure sensor is kept in a dark or low-light place to reduce the of temperature and light affecting the sensor.




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