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Author Topic: Micro Whistle  (Read 339 times)

Captain Flack

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Micro Whistle
« on: January 31, 2019, 01:14:23 PM »

I have been given I believe to be an action Micro Whistle.  I have no idea how to connect this or even what voltage it works on.  Any ideas please.
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DaveM

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Re: Micro Whistle
« Reply #1 on: January 31, 2019, 01:47:47 PM »

Red +ve
Black -ve
6v max.
DM
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malcolmfrary

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Re: Micro Whistle
« Reply #2 on: January 31, 2019, 06:08:23 PM »

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"Trying is the first step towards failure" - Homer (Simpson)

DaveM

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Re: Micro Whistle
« Reply #3 on: January 31, 2019, 06:58:58 PM »

Thanks for the compliment, MF - but I suspect this is what the OP refers to https://www.componentshop.co.uk/micro-whistle.html
Of course I could be wrong. It wouldn't be the first time...
DM
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Captain Flack

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Re: Micro Whistle
« Reply #4 on: February 01, 2019, 09:54:46 AM »

Thanks for the replies.  I had already tried the normal wiring and it didn't work so I was wondering if it needed another "gadget" to power it. It would appear to be defective.
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DaveM

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Re: Micro Whistle
« Reply #5 on: February 01, 2019, 02:49:19 PM »

If it's a P29 Steam Horn/Whistle then it can be repaired - send via Component-Shop. If it's the tiny cylindrical Micro-whistle thingy then just bin it.

DM
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Captain Flack

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Re: Micro Whistle
« Reply #6 on: February 06, 2019, 01:55:05 PM »

This is marked "HPE-120", and I now have two of them that don't work.  I have put 6v to them but nothing.
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Captain Flack

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Re: Micro Whistle
« Reply #7 on: February 06, 2019, 02:26:36 PM »

I understand this now to be a piezo buzzer working between 3-30v.  Does anyone know if this is correct?
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coch y bonddu

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Re: Micro Whistle
« Reply #8 on: February 06, 2019, 05:30:35 PM »

If it is round and black with 2 wires on it then this could well be what you got and they are only 1.50ea off Component shop


A Picture speaks a thousand words




Dave



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C-3PO

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Re: Micro Whistle
« Reply #9 on: February 06, 2019, 06:34:36 PM »

A quick Google suggests a HPE-120 is just the transducer - I think it needs an external/additional circuit (driver/exciter) to make it work.

If it is then applying a voltage to it is like putting a battery across loudspeaker terminals.

If of course there is additional circuitry then ignore the above

C-3PO
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I think it's the way I have learnt most of my stuff - getting very stuck first...
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