buzzer
A program to run alarm on button pushed.
To activate the alarm, push the button. Same for desactivation. The alarm is launched in a separate task and controlled by the main task (which holds the push button logic).
You can run the application in "DEBUG" mode using:
make run-debug name=buzzer
The FreeRTOS engine is replaced by threads.
Hardware
Variant 1
- 1x Passive Buzzer
- 1x Push button
- 1 NPN transistor for signal amplification
- 1x 1k ohm resistor (NPN collector)
- 2x 10k ohm resistor
Variant 2
You can play with the frequency [1500; 2000] hz thanks to the potentiometer.
- Variant 1
- 1x Rotary potentiometer
- 1x blue LED
Enjoy ! 😉