Using PWM frequencies from ultrasound, the Arduino can now produce square tone waves() with 256 volume levels with nothing but a speaker!
Devices and components
Arduino Uno Rev3
Speaker: 0.25 W, 8 ohms
Project description
Set output to HIGH
Wait 1136 microseconds
Set output LOW
Wait 1136 microseconds
analogWrite(output, 127);
Wait 1136 microseconds
analogWrite(output, 0);
Wait 1136 microseconds
Timer 0:
Timer 1:
Volume Library
The Volume library is also available through Arduino Library Manager!
Downloadable files
Connection guide
Connection guide
Connection guide
Connection guide
Note: Content and images are from: https://projecthub.arduino.cc/, with some modifications.
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