TEMPERATURE SENSOR + 7 SEGMENT DISPLAY
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TEMPERATURE SENSOR + 7 SEGMENT DISPLAY
by unu » Fri Feb 06, 2009 11:49 am
Hello. I have a project for my school , and i`m not that good in programming. Can anyone help me with a project : Displaying temperature(celsius) on a 7 segment display . The temperature sensor can be analog or digital (at your choise.). Thank you very much .
- unu
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- Joined: Fri Feb 06, 2009 11:46 am
by NickH » Sat Feb 07, 2009 12:43 pm
If you have an FPGA, you'll need a temperature sensor with digital output, like this: http://www.knjn.com/?pg=cat&src=15.
But unless your class was about FPGAs, don't use an FPGA for this project! It's simpler to use a microcontroller (PIC or AVR/Arduino).
You can use the same digital sensor; Or if your microcontroller has analog input (ADC), a simple analog temperature sensor can be made with a thermistor and pull-up resistor. You'll have to work out a table of voltage->temperature (see http://en.wikipedia.org/wiki/Thermistor#B_parameter_equation) and store it as a Look-Up Table. You could even put the 7Seg patterns into the LUT.
Nick
But unless your class was about FPGAs, don't use an FPGA for this project! It's simpler to use a microcontroller (PIC or AVR/Arduino).
You can use the same digital sensor; Or if your microcontroller has analog input (ADC), a simple analog temperature sensor can be made with a thermistor and pull-up resistor. You'll have to work out a table of voltage->temperature (see http://en.wikipedia.org/wiki/Thermistor#B_parameter_equation) and store it as a Look-Up Table. You could even put the 7Seg patterns into the LUT.
Nick
- NickH
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- Joined: Tue Sep 02, 2008 1:53 pm
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