Airelectronics U-Ground Benutzerhandbuch - Seite 9
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Seite druckenU-Ground OneBoard User Manual - Alarms
The audible tone generated at current revision are 3 beeps of half a second duration and
variable pitch in function of the toggled alarm.
An audible tone will be generated any time an alarms toggles from deactivated to active. If
more than one alarm is triggered at the same time, the ground station will generate tones for
every one of the alarms in a sequential manner.
Audible tone is designed to be used as an adition to a visual feedback mechanism: Audible
tone attacts the attention of the operator and he checks the visual feedback panel.
Again, the Groud Station will drive at most 25 mA at 3.3V TTL. As this is usually too weak to
drive a buzzer with enough power to be clearly audible, a MOSFET drive would be
recommended for the buzzer.
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