An Overview
This Lab should result in a bargraph voltmeter - it will display a representation of a sampled
voltage > 610mVdc upto 4.7 Vdc - in steps of approximately 610mV. (At ~ 4.7 V all the 8 of the
bargraph leds will be on).
Review the video ‘complete _system’ on DC Connect in the Final Project folder - to see it functioning.
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Task 1
Referring to the Nano schematic - you need to add a potentiometer, to provide • the Analog signal,
the source voltage should be +5v and a ground (refer to the Project Notes of Lab 8).
To determine the wiper pin connection point on the Nano, by referring to the Visual Design
Code of this project.
• Now refer the Visual Design code provided the other output bits that need to added the Main
LOOP function - they have already been defined in the SETUP function.
Refer to the SA function (Do Not Edit) on the second code page ‘Conversion’.
After completing the above modifications - build and test using simulation - you see the appropriate
bits change state as the potentiometer voltage changes by ~ 610mV
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Conclusion, you implemented a MCU & FPGA based voltage meter - this utilized a trim-pot and an
A-D input, your finalized code created an Led bargraph - each segment of the bargraph represents ~
610mV.
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