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Arduino library for generating morse code on a piezo speaker I use it for Arduino projects as a alternative to using displays. In some cases you just want to know the status of a device. It's also ...

After uploading the code the Piezo will start making short beeps. On bright light the Piezo will only beep and on dark light it will be short. Some ideas for this experiment: Alarm for Lights in the ...

Version using a Piezo buzzer. “A low buzz indicates that the transistor is correctly configured and working, no sound indicates the test transistor is either wrongly configured or dead.” Simple Tester ...