Author Topic: Anybody recommend a buzzer that works at low voltage?  (Read 2015 times)

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Offline mc

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Anybody recommend a buzzer that works at low voltage?
« on: January 11, 2014, 02:59:14 pm »
I'm looking for a buzzer that will be reasonably loud when powered by a single cell LiPo (let's say 3 to 5V).

Anybody got any experience/recommendations for such a thing?
Google searches through up low battery buzzers/alarms, but I just need a reasonably loud buzzer, not a low voltage detector!
 

Offline peter.mitchell

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Re: Anybody recommend a buzzer that works at low voltage?
« Reply #1 on: January 11, 2014, 03:55:13 pm »
with the price of the low voltage detector buzzer, just buy it and salvage the buzzer off it.
 

Offline mdszy

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Re: Anybody recommend a buzzer that works at low voltage?
« Reply #2 on: January 11, 2014, 03:55:48 pm »
I'm looking for a buzzer that will be reasonably loud when powered by a single cell LiPo (let's say 3 to 5V).

Anybody got any experience/recommendations for such a thing?
Google searches through up low battery buzzers/alarms, but I just need a reasonably loud buzzer, not a low voltage detector!

You'd probably be looking for a piezo buzzer such as this one: http://octopart.com/pb-1224pe-05q-mallory-154408

The datasheet mentions it works for voltages from 4.5 - 5.5V, which should work for you.
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Offline Mr Smiley

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Re: Anybody recommend a buzzer that works at low voltage?
« Reply #3 on: January 11, 2014, 04:07:49 pm »
How loud ?

Small lcd alarm clocks work at 1.5v and I’ve heard some that are VERY loud just using a piezo disk with a parallel inductor; glued on one edge of the disk and stuck anywhere inside the case.

I have one that bugs me every time the alarm goes off,,,,, The battery is so week that the lcd can hardly be seen but i can hear it across the house through two rooms. It bugs me because i can't get that intensity with other similar size disks no matter what i do with them. I see it as one of those one in a million mistakes, grab the disk, dab of glue, stick it,,,,,,, that'll do and on to the next one, and never repeatable. It doesn't even have a resonance chamber  |O

If only i could replicate its intensity with such a low supply  |O

Anyway, every day it makes me ponder  :-/O

I digress,,,,,

 :)
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Offline mc

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Re: Anybody recommend a buzzer that works at low voltage?
« Reply #4 on: January 11, 2014, 07:17:51 pm »
Load enough that it's quite noticeable, but not loud enough that it deafens everybody within a 5m radius!

Small peize does sound like a possibility, but I was hoping for something that didn't require anything other a simple power feed.
 

Offline SeanB

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Re: Anybody recommend a buzzer that works at low voltage?
« Reply #5 on: January 11, 2014, 08:44:06 pm »
Small piezo, inductor, one resistor and a single transistor either all in one pack or a diy kit. Take a 12V one and modify with adding an inductor instead of the resistor inside and lower the base resistor down a little.
 

Offline tasos987

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Re: Anybody recommend a buzzer that works at low voltage?
« Reply #6 on: January 11, 2014, 08:55:23 pm »
According to them:
http://www.buzzer-speaker.com/index.html
The sound strength is measured in db , 10 cm from the buzzer and is reduced about 6 db every 10 cm you are going away from the buzzer.
So, in order to have deafened everybody within a 5m radius .... What should be the original strenght ? :wtf:
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Offline Kappes Buur

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