of the LCD. Figure 1 is the schematic diagram of how to
connect the LCD screen to an Arduino Uno.
Figure 2 shows what that should look like. Note that I
have jumpers over the center barrier of the breadboard.
This arrangement makes some more space available for
our jumper wires.
For a sine wave test source, I am using a program
called "Audio SweepGen" running on my PC. To connect
it to the Arduino analog input A0, there is a little bit of
circuitry involved. Figure 3 is the input circuit schematic.
None of the resistor values are critical. You can
sometimes get away with just using the . 47 µF capacitor,
as the Arduino's analog input seems to be naturally self-biasing to around 2. 5 volts.
Here is the sketch to determine what the default
conversion speed is:
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