User Manual

For C language users:

Step 2: Open the code file

cd /home/pi/SunFounder_Super_Kit_V3.0_for_Raspberry_Pi/C

Step 3: Compile the Code

make 06_beep

Step 4: Run the executable file above.

sudo ./06_beep

Code Explanation

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

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