SunFounder Pico-4wd car, Manual

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SunFounder pico_4wd_car
Upon running, you will see that the values in the Shell change when you place the grayscale module
at a height of about 1cm above the different surfaces, indicating that it is working properly.
In general, the value for
white surfaces
> the value for
black surfaces
> the value for
overhanging
(grayscale module 10cm above the ground).
3. Because light intensities differ in different environments, the factory-set contrast may not be suitable for your
current environment, which means the grayscale module cannot identify white and black lines well, so it needs
to be calibrated.
• Tape a small piece of black electrical tape to the ground or table.
• Hold the grayscale module 1 cm above the table (this is about the same height as after assembly,
so you can use it directly after calibration).
• Keep
test_grayscale.py
running, then use a screwdriver to adjust the potentiometer on
the grayscale module until the values printed on the Shell are relatively far apart. Based on the
actual situation, your values should differ from mine.
1.4. 4. Test the Modules 21