On Wednesday, May 22, 2019 at 5:11:37 AM UTC-5, default wrote:
> On Tue, 21 May 2019 19:33:42 -0700 (PDT), AK
> <scientist77017@gmail.com> wrote:
>
> >On Monday, May 20, 2019 at 10:04:35 PM UTC-5, default wrote:
> >> On Mon, 20 May 2019 18:04:36 -0700 (PDT), AK
> >> <scientist77017@gmail.com> wrote:
> >>
> >> >On Monday, May 20, 2019 at 4:48:52 PM UTC-5, default wrote:
> >> >> On Mon, 20 May 2019 12:20:32 -0700 (PDT), AK
> >> >> <scientist77017@gmail.com> wrote:
> >> >>
> >> >> >I got this, but saw no polarity markings like my other larger piezo buzzer.
> >> >> >
> >> >> >Andy
> >> >> >
> >> >> >Piezo Transducer
> >> >> >Electrical Specifications:
> >> >> >
> >> >> > Rated Voltage: 5Vp-p
> >> >> > Rated Current: 2mA (max)
> >> >> > Sound Output at 10cm: 85 dBA
> >> >> > Resonant Frequency: 2.04kHz
> >> >> > Dimensions: 8.43mm H x 12.1mm diameter
> >> >> > Number of pins: 2
> >> >> > Pitch: 6.5mm
> >> >> > Lead thickness: 0.62mm
> >> >> > PC mount
> >> >> > Markings: 12RT04CC
> >> >>
> >> >> It is not a buzzer, it is a transducer.
> >> >>
> >> >> A transducer is a device that can convert (in this case) sound to
> >> >> electricity or electricity to sound. To use that as a buzzer you will
> >> >> need to drive it with an oscillator, at 2.04 kilo hertz and a wave
> >> >> with a 5 volt peak to peak amplitude (to get the maximum noise out of
> >> >> it)
> >> >>
> >> >> It doesn't have the polarity indicated because it has no polarity.
> >> >> Think of it as a loudspeaker (another transducer since they can be
> >> >> used as microphones and convert sound to electricity)
> >> >>
> >> >> It will work at other frequencies with less volume. It should click
> >> >> when you put a battery on the leads, and click again when you reverse
> >> >> the polarity of the battery. (it also stores a charge like a
> >> >> capacitor)
> >> >>
> >> >> Look up oscillators if you want to use it as a buzzer. The 555 makes
> >> >> a dandy oscillator.
> >> >
> >> >Ok. I want to replace the current piezo buzzer I have with something that will fit on my breadboard.
> >> >
> >> >It's a pulse type which I do not like.
> >> >
> >> >Andy
> >>
> >> I like bells myself. I cut a chime bar from some hard aluminum alloy
> >> and used a solenoid to pull down on a mallet to strike the bar. It
> >> sounded bad (with all the mechanical noise the solenoid made) and I
> >> ended up using a 555 as a monostable timer to get just the right
> >> timing on the stroke of the mallet.
> >>
> >> I hate piezo buzzers. Even a speaker driven with a 555 sounds better
> >> to me.
> >
> >What specs do I need to look for the speaker?
> >
> >My circuit runs from 9 vdc.
> >
> >Andy
> Any small speaker should work. There's dozens of paper cone speakers
> in a 2-3" size that make good annunciators. If you have a junk radio
> you can cannibalize a speaker from it. I'd use 8 ohms or higher would
> be my choice if I was buying one. You would also need/want an
> electrolytic cap of 10-100 uf to use in series with it to keep DC off
> the speaker.
>
> http://www.circuitdiagram.org/morse-code-practice-oscillator-using-555.html
> http://www.cranburyscouts.org/ElecOsc.htm
> http://www.circuitdb.com/?p=254
Thanks.
Reply by default●May 22, 20192019-05-22
On Tue, 21 May 2019 19:33:42 -0700 (PDT), AK
<scientist77017@gmail.com> wrote:
>On Monday, May 20, 2019 at 10:04:35 PM UTC-5, default wrote:
>> On Mon, 20 May 2019 18:04:36 -0700 (PDT), AK
>> <scientist77017@gmail.com> wrote:
>>
>> >On Monday, May 20, 2019 at 4:48:52 PM UTC-5, default wrote:
>> >> On Mon, 20 May 2019 12:20:32 -0700 (PDT), AK
>> >> <scientist77017@gmail.com> wrote:
>> >>
>> >> >I got this, but saw no polarity markings like my other larger piezo buzzer.
>> >> >
>> >> >Andy
>> >> >
>> >> >Piezo Transducer
>> >> >Electrical Specifications:
>> >> >
>> >> > Rated Voltage: 5Vp-p
>> >> > Rated Current: 2mA (max)
>> >> > Sound Output at 10cm: 85 dBA
>> >> > Resonant Frequency: 2.04kHz
>> >> > Dimensions: 8.43mm H x 12.1mm diameter
>> >> > Number of pins: 2
>> >> > Pitch: 6.5mm
>> >> > Lead thickness: 0.62mm
>> >> > PC mount
>> >> > Markings: 12RT04CC
>> >>
>> >> It is not a buzzer, it is a transducer.
>> >>
>> >> A transducer is a device that can convert (in this case) sound to
>> >> electricity or electricity to sound. To use that as a buzzer you will
>> >> need to drive it with an oscillator, at 2.04 kilo hertz and a wave
>> >> with a 5 volt peak to peak amplitude (to get the maximum noise out of
>> >> it)
>> >>
>> >> It doesn't have the polarity indicated because it has no polarity.
>> >> Think of it as a loudspeaker (another transducer since they can be
>> >> used as microphones and convert sound to electricity)
>> >>
>> >> It will work at other frequencies with less volume. It should click
>> >> when you put a battery on the leads, and click again when you reverse
>> >> the polarity of the battery. (it also stores a charge like a
>> >> capacitor)
>> >>
>> >> Look up oscillators if you want to use it as a buzzer. The 555 makes
>> >> a dandy oscillator.
>> >
>> >Ok. I want to replace the current piezo buzzer I have with something that will fit on my breadboard.
>> >
>> >It's a pulse type which I do not like.
>> >
>> >Andy
>>
>> I like bells myself. I cut a chime bar from some hard aluminum alloy
>> and used a solenoid to pull down on a mallet to strike the bar. It
>> sounded bad (with all the mechanical noise the solenoid made) and I
>> ended up using a 555 as a monostable timer to get just the right
>> timing on the stroke of the mallet.
>>
>> I hate piezo buzzers. Even a speaker driven with a 555 sounds better
>> to me.
>
>What specs do I need to look for the speaker?
>
>My circuit runs from 9 vdc.
>
>Andy
On Monday, May 20, 2019 at 10:04:35 PM UTC-5, default wrote:
> On Mon, 20 May 2019 18:04:36 -0700 (PDT), AK
> <scientist77017@gmail.com> wrote:
>
> >On Monday, May 20, 2019 at 4:48:52 PM UTC-5, default wrote:
> >> On Mon, 20 May 2019 12:20:32 -0700 (PDT), AK
> >> <scientist77017@gmail.com> wrote:
> >>
> >> >I got this, but saw no polarity markings like my other larger piezo buzzer.
> >> >
> >> >Andy
> >> >
> >> >Piezo Transducer
> >> >Electrical Specifications:
> >> >
> >> > Rated Voltage: 5Vp-p
> >> > Rated Current: 2mA (max)
> >> > Sound Output at 10cm: 85 dBA
> >> > Resonant Frequency: 2.04kHz
> >> > Dimensions: 8.43mm H x 12.1mm diameter
> >> > Number of pins: 2
> >> > Pitch: 6.5mm
> >> > Lead thickness: 0.62mm
> >> > PC mount
> >> > Markings: 12RT04CC
> >>
> >> It is not a buzzer, it is a transducer.
> >>
> >> A transducer is a device that can convert (in this case) sound to
> >> electricity or electricity to sound. To use that as a buzzer you will
> >> need to drive it with an oscillator, at 2.04 kilo hertz and a wave
> >> with a 5 volt peak to peak amplitude (to get the maximum noise out of
> >> it)
> >>
> >> It doesn't have the polarity indicated because it has no polarity.
> >> Think of it as a loudspeaker (another transducer since they can be
> >> used as microphones and convert sound to electricity)
> >>
> >> It will work at other frequencies with less volume. It should click
> >> when you put a battery on the leads, and click again when you reverse
> >> the polarity of the battery. (it also stores a charge like a
> >> capacitor)
> >>
> >> Look up oscillators if you want to use it as a buzzer. The 555 makes
> >> a dandy oscillator.
> >
> >Ok. I want to replace the current piezo buzzer I have with something that will fit on my breadboard.
> >
> >It's a pulse type which I do not like.
> >
> >Andy
>
> I like bells myself. I cut a chime bar from some hard aluminum alloy
> and used a solenoid to pull down on a mallet to strike the bar. It
> sounded bad (with all the mechanical noise the solenoid made) and I
> ended up using a 555 as a monostable timer to get just the right
> timing on the stroke of the mallet.
>
> I hate piezo buzzers. Even a speaker driven with a 555 sounds better
> to me.
What specs do I need to look for the speaker?
My circuit runs from 9 vdc.
Andy
Reply by default●May 21, 20192019-05-21
On Mon, 20 May 2019 18:04:36 -0700 (PDT), AK
<scientist77017@gmail.com> wrote:
>On Monday, May 20, 2019 at 4:48:52 PM UTC-5, default wrote:
>> On Mon, 20 May 2019 12:20:32 -0700 (PDT), AK
>> <scientist77017@gmail.com> wrote:
>>
>> >I got this, but saw no polarity markings like my other larger piezo buzzer.
>> >
>> >Andy
>> >
>> >Piezo Transducer
>> >Electrical Specifications:
>> >
>> > Rated Voltage: 5Vp-p
>> > Rated Current: 2mA (max)
>> > Sound Output at 10cm: 85 dBA
>> > Resonant Frequency: 2.04kHz
>> > Dimensions: 8.43mm H x 12.1mm diameter
>> > Number of pins: 2
>> > Pitch: 6.5mm
>> > Lead thickness: 0.62mm
>> > PC mount
>> > Markings: 12RT04CC
>>
>> It is not a buzzer, it is a transducer.
>>
>> A transducer is a device that can convert (in this case) sound to
>> electricity or electricity to sound. To use that as a buzzer you will
>> need to drive it with an oscillator, at 2.04 kilo hertz and a wave
>> with a 5 volt peak to peak amplitude (to get the maximum noise out of
>> it)
>>
>> It doesn't have the polarity indicated because it has no polarity.
>> Think of it as a loudspeaker (another transducer since they can be
>> used as microphones and convert sound to electricity)
>>
>> It will work at other frequencies with less volume. It should click
>> when you put a battery on the leads, and click again when you reverse
>> the polarity of the battery. (it also stores a charge like a
>> capacitor)
>>
>> Look up oscillators if you want to use it as a buzzer. The 555 makes
>> a dandy oscillator.
>
>Ok. I want to replace the current piezo buzzer I have with something that will fit on my breadboard.
>
>It's a pulse type which I do not like.
>
>Andy
I like bells myself. I cut a chime bar from some hard aluminum alloy
and used a solenoid to pull down on a mallet to strike the bar. It
sounded bad (with all the mechanical noise the solenoid made) and I
ended up using a 555 as a monostable timer to get just the right
timing on the stroke of the mallet.
I hate piezo buzzers. Even a speaker driven with a 555 sounds better
to me.
Reply by AK●May 20, 20192019-05-20
On Monday, May 20, 2019 at 4:48:52 PM UTC-5, default wrote:
> On Mon, 20 May 2019 12:20:32 -0700 (PDT), AK
> <scientist77017@gmail.com> wrote:
>
> >I got this, but saw no polarity markings like my other larger piezo buzzer.
> >
> >Andy
> >
> >Piezo Transducer
> >Electrical Specifications:
> >
> > Rated Voltage: 5Vp-p
> > Rated Current: 2mA (max)
> > Sound Output at 10cm: 85 dBA
> > Resonant Frequency: 2.04kHz
> > Dimensions: 8.43mm H x 12.1mm diameter
> > Number of pins: 2
> > Pitch: 6.5mm
> > Lead thickness: 0.62mm
> > PC mount
> > Markings: 12RT04CC
>
> It is not a buzzer, it is a transducer.
>
> A transducer is a device that can convert (in this case) sound to
> electricity or electricity to sound. To use that as a buzzer you will
> need to drive it with an oscillator, at 2.04 kilo hertz and a wave
> with a 5 volt peak to peak amplitude (to get the maximum noise out of
> it)
>
> It doesn't have the polarity indicated because it has no polarity.
> Think of it as a loudspeaker (another transducer since they can be
> used as microphones and convert sound to electricity)
>
> It will work at other frequencies with less volume. It should click
> when you put a battery on the leads, and click again when you reverse
> the polarity of the battery. (it also stores a charge like a
> capacitor)
>
> Look up oscillators if you want to use it as a buzzer. The 555 makes
> a dandy oscillator.
Ok. I want to replace the current piezo buzzer I have with something that will fit on my breadboard.
It's a pulse type which I do not like.
Andy
Reply by default●May 20, 20192019-05-20
On Mon, 20 May 2019 12:20:32 -0700 (PDT), AK
<scientist77017@gmail.com> wrote:
>I got this, but saw no polarity markings like my other larger piezo buzzer.
>
>Andy
>
>Piezo Transducer
>Electrical Specifications:
>
> Rated Voltage: 5Vp-p
> Rated Current: 2mA (max)
> Sound Output at 10cm: 85 dBA
> Resonant Frequency: 2.04kHz
> Dimensions: 8.43mm H x 12.1mm diameter
> Number of pins: 2
> Pitch: 6.5mm
> Lead thickness: 0.62mm
> PC mount
> Markings: 12RT04CC
It is not a buzzer, it is a transducer.
A transducer is a device that can convert (in this case) sound to
electricity or electricity to sound. To use that as a buzzer you will
need to drive it with an oscillator, at 2.04 kilo hertz and a wave
with a 5 volt peak to peak amplitude (to get the maximum noise out of
it)
It doesn't have the polarity indicated because it has no polarity.
Think of it as a loudspeaker (another transducer since they can be
used as microphones and convert sound to electricity)
It will work at other frequencies with less volume. It should click
when you put a battery on the leads, and click again when you reverse
the polarity of the battery. (it also stores a charge like a
capacitor)
Look up oscillators if you want to use it as a buzzer. The 555 makes
a dandy oscillator.
Reply by Jeroen Belleman●May 20, 20192019-05-20
On 2019-05-20 21:20, AK wrote:
> I got this, but saw no polarity markings like my other larger piezo buzzer.
>
> Andy
>
> Piezo Transducer
> Electrical Specifications:
>
> Rated Voltage: 5Vp-p
> Rated Current: 2mA (max)
> Sound Output at 10cm: 85 dBA
> Resonant Frequency: 2.04kHz
> Dimensions: 8.43mm H x 12.1mm diameter
> Number of pins: 2
> Pitch: 6.5mm
> Lead thickness: 0.62mm
> PC mount
> Markings: 12RT04CC
>
It expects to be driven by an alternating voltage. If you
connect it to a DC source, a battery for example, it will
just go *tick!*.
Jeroen Belleman
Reply by AK●May 20, 20192019-05-20
I got this, but saw no polarity markings like my other larger piezo buzzer.
Andy
Piezo Transducer
Electrical Specifications:
Rated Voltage: 5Vp-p
Rated Current: 2mA (max)
Sound Output at 10cm: 85 dBA
Resonant Frequency: 2.04kHz
Dimensions: 8.43mm H x 12.1mm diameter
Number of pins: 2
Pitch: 6.5mm
Lead thickness: 0.62mm
PC mount
Markings: 12RT04CC