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Need a beeping device

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Richard

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Nov 21, 2009, 11:47:01 AM11/21/09
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Hi,
I am looking for a component to control from a microcontroller to make
a beeping noise, nothing to loud but to sound electronic and not like a
buzzer. I just need an audible alert that is not to irritating. Any ideas
would be great, I don't have a DAC on the microcontroller, and the
simpler the better.

Thanks

Randy Day

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Nov 21, 2009, 1:57:27 PM11/21/09
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In article <he95i5$93f$1...@news.eternal-september.org>,
johnat...@googlemail.com says...

Go to the DigiKey website, type 'audio'
into the search box, and you'll get
a couple thousand beepers, buzzers,
sirens and speakers to choose from.

HTH

Shaun

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Nov 21, 2009, 2:53:35 PM11/21/09
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"Richard" <johnat...@googlemail.com> wrote in message
news:he95i5$93f$1...@news.eternal-september.org...

Go to a Radio Shack store if there are any in your area, they have beepers.

Shaun


whit3rd

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Nov 22, 2009, 4:30:15 PM11/22/09
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On Nov 21, 8:47 am, Richard <johnathon...@googlemail.com> wrote:

>    I am looking for a component to control from a microcontroller to make

> a beeping noise ... the
> simpler the better.

Define 'simple'. If your microcontroller has spare PWM or frequency
outputs,
a capacitor and a speaker (or even an earbud from a broken headset)
will do the job. Is size important (wristwatch-style piezoelectric
transducers are small), or parts count (there are sonic-output
functional modules), or mounting in a panel (things like Mallory
Sonalert come with mount hardware kits)?

In terms of simplicity of wiring, you could use a relay to control
your
doorbell (which might be a full four-second Westminster chime with
motorized sequencing), it'd STILL be 'simple' in some sense.

Michael Black

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Nov 22, 2009, 4:44:23 PM11/22/09
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On Sun, 22 Nov 2009, whit3rd wrote:

> On Nov 21, 8:47 am, Richard <johnathon...@googlemail.com> wrote:
>
>>    I am looking for a component to control from a microcontroller to make
>> a beeping noise ... the
>> simpler the better.
>
> Define 'simple'. If your microcontroller has spare PWM or frequency
> outputs,
> a capacitor and a speaker (or even an earbud from a broken headset)
> will do the job. Is size important (wristwatch-style piezoelectric
> transducers are small), or parts count (there are sonic-output
> functional modules), or mounting in a panel (things like Mallory
> Sonalert come with mount hardware kits)?
>

Or the traditional way, a unijunction transistor feeding a speaker,
which beats a 2transistor multivibrator feeding a speaker since it uses
one active component (albeit one likely harder to find).

555s basically took over that field when they came along.

Michael

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