SunFounder Super Kit 3.0, Руководство пользователя

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digitalWrite(BeepPin, LOW); // We use an active buzzer in this experiment, so it will
make sound automatically when connecting to the direct current. This sketch is to set
the I/O port as low level (0V), thus to manage the transistor and make the buzzer beep.
digitalWrite(BeepPin, HIGH); // To set the I/O port as high level(5V), thus the
transistor is not energized and the buzzer doesn’t beep.
For Python users:
Step 2: Open the code file
cd / home / pi / SunFounder_Super_Kit_V3.0_for_Raspberry_Pi / Python
Step 3: Run
sudo python 06_beep.py
Code Explanation
GPIO.output(BeepPin, GPIO.LOW) # Set the buzzer pin as low level.
time.sleep(0.1) # Wait for 0.1 second. Change the switching frequency by changing this
parameter. Note: Not the sound frequency. Active Buzzer cannot change sound frequency.
GPIO.output(BeepPin, GPIO.HIGH) # close the buzzer
time.sleep(0.1)
Now, you should hear the buzzer make sounds.
Further Exploration
If you have a passive buzzer in hand, you can replace the active buzzer with it. Now you can
make a buzzer sound like “do re mi fa so la si do” with just some basic knowledge of
programming. Give a try!