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History

AnHardt fd0e81b0c7 Distinguish between BUZZER and SPEAKER (PR#2513) A speaker needs a AC or a pulsed DC to make a sound, a buzzer only needs a DC. A buzzer has it's own resonator. It works in most cases to feed the buzzer with a pulsed DC, but the sound will not be as loud as with pure DC. There seem to be boards where the BEEPER-pin is not able to handle a PWM. Obviously intended for a buzzer. To make these board able to handle a speaker * replace the PWM based tone()-function again with a on-delay-off-delay loop. Hopefully the last time I touch the beeper code.	9 years ago
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Configuration.h	Distinguish between BUZZER and SPEAKER (PR#2513)	9 years ago
Configuration_adv.h	make the dual z-endstop optional (PR#2277)	10 years ago

AnHardt fd0e81b0c7 Distinguish between BUZZER and SPEAKER (PR#2513)

A speaker needs a AC or a pulsed DC to make a sound, a buzzer only needs a DC.
A buzzer has it's own resonator. It works in most cases to feed the buzzer with a pulsed DC, but the sound will not be as loud as with pure DC.

There seem to be boards where the BEEPER-pin is not able to handle a PWM. Obviously intended for a buzzer.
To make these board able to handle a speaker

* replace the PWM based tone()-function again with a on-delay-off-delay loop.

Hopefully the last time I touch the beeper code.

Configuration.h

Distinguish between BUZZER and SPEAKER (PR#2513)

Configuration_adv.h

make the dual z-endstop optional (PR#2277)