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David Gwilliam
2026-02-12 21:00:02 -08:00
parent 77f8236347
commit 8bdbf227ca
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libraries/audio-tools/examples/examples-stream/streams-generator-pwm/README.md Normal file
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# PWM Output Test
This is a simple basic test for the PWM output.
We just send a generated sine wave to some defined pins and expect to hear some audio signal.
### Output Device: Piezo Electric Element
To test the output I am using a piezo electric element
![DAC](https://pschatzmann.github.io/Resources/img/piezo.jpeg)
You can also use some simple earphones
![DAC](https://pschatzmann.github.io/Resources/img/earphones.jpg)
It should also be possible to connect a headphone to the output pins...
The pins depend on the Processor:
| PIEZO | ESP32 | RPI Pico | MBED | UNO R4 |
| --------| -------------|---------------|--------------|-------------|
| + | GPIO4/GPIO5 | GPIO2/GPIO3 | GPIO2/GPIO3 | GPIO2/GPIO4 |
| - | GND | GND | GND | GND |