NASA Instruments: buzzer voltage?

[Poignard]

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

 

[Refueler]

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

 

[Poignard]

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

Thanks but I was hoping to find an equivalent on eBay and avoid NASA's delivery charges.

 

[VicS]

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

 

[Poignard]

If you have an old one it may be marked on the back

Unfortunately I don't.

 

[Alex_Blackwood]

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]

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.

 

[Refueler]

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.

 

[VicS]

Unfortunately I don't.

As alex says many have quite a volage range

 

[VicS]

There is a good selection to choose from at Rapid Electronics:- buzzers | Rapid Online

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[Poignard]

I don't know if this helps but here's a picture of the real thing:

 

[starfire]

I don't know if this helps but here's a picture of the real thing:

View attachment 178522

https://cpc.farnell.com/unbranded/abi-023-rc/piezo-buzzer-12vdc-leads/dp/LS02470