NASA Instruments: buzzer voltage?

Poignard

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Can anyone tell me please, what is the operating voltage of the buzzer (bleeper) that comes with NASA instruments, eg Clipper Depth Sounder.

The NASA part number is SM523-BUZZER
 

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Poignard

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VicS

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Can anyone tell me please, what is the operating voltage of the buzzer (bleeper) that comes with NASA instruments, eg Clipper Depth Sounder.

The NASA part number is SM523-BUZZER
If you have an old one it may be marked on the back
 

Alex_Blackwood

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In take it you have the manual ? I know it does not give voltage of the buzzer - but shows it wired to the green and black wires in mine.

I have to say that mine hardly ever sounds when it should !!

I have a feeling its an Active 12V ....

If you need a new one ...... Spare alarm buzzer - Clipper, Target and Cruiser Depth - Nasa Marine Instruments
Probably "Bog Standard 12 volt" Most buzzers of that type, Piezoelectric, have a large voltage range. Load of 3-24 volt, for example, available on line.
 

AngusMcDoon

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Probably "Bog Standard 12 volt" Most buzzers of that type, Piezoelectric, have a large voltage range. Load of 3-24 volt, for example, available on line.
There are some where all you need is a DC voltage applied to make them buzz, & others that need a driving circuit that oscillates. Datasheet will need to be consulted. The last commercial device I worked on the electronic engineer had specified the wrong type - all you get is a click.
 

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There are some where all you need is a DC voltage applied to make them buzz, & others that need a driving circuit that oscillates. Datasheet will need to be consulted. The last commercial device I worked on the electronic engineer had specified the wrong type - all you get is a click.

Active vs Passive.

Most applications like this use the ACTIVE type ... built in driver.
 
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