Piezo buzzer - no polarity marks

A

AK

Guest
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
 
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
Click to expand...

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
 
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
Click to expand...

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.
 
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.
Click to expand...

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
 
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
Click to expand...

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.
 
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.
Click to expand...

What specs do I need to look for the speaker?

My circuit runs from 9 vdc.

Andy
 
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
Click to expand...
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
 
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
Click to expand...

Thanks.
 
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