Raj writes to inform us of his Embedded Lab tutorial with tips on using the Fixed Voltage Reference (FVR) module in enhanced mid-range 8-bit PIC microcontrollers for a precise and accurate A/D conversion.
Raj demos how to use the built-in module of the PIC16F1827 that generates a stable reference voltage internally known as the FVR. “The analog signal for this experiment is taken from the output of a LM34DZ temperature sensor. After the A/D conversion, the PIC16F1827 displays the temperature on a 2×8 character LCD.” He notes the importance of the reference voltage in determining both the range and the resolution (Volt/Count) of the ADC.
The zip file containing the source code and hex files can be downloaded from Embedded Lab.
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