834 B
834 B
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
You can also use some simple earphones
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 |