Model Boat Mayhem
Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: Captain Flack on January 31, 2019, 01:14:23 pm
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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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Red +ve
Black -ve
6v max.
DM
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Nice drawing here - https://www.componentshop.co.uk/p29-steam-whistle-horn.html
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Thanks for the compliment, MF - but I suspect this is what the OP refers to https://www.componentshop.co.uk/micro-whistle.html (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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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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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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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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I understand this now to be a piezo buzzer working between 3-30v. Does anyone know if this is correct?
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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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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