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Santa Cruz California
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I'm driving a piezo buzzer with the tone function and I can hardly hear the tones. I took the resister out of the circuit but it barely helped at all. Is there some fix or do I need a different buzzer?
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Left Coast, CA (USA)
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Many piezo buzzers only respond to a narrow range of audio frequencies. Perhaps a small speaker and amp chip would suit your needs better?

Lefty
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There are plenty of amplifier circuits on the internet. Most of them can be built very quickly, and at a low price. Check out http://www.zen22142.zen.co.uk/Circuits/Audio/audio.html for some circuits. You can then have a louder output than you'd get out of the arduino, and a wider frequency respnse, if you use a speaker.

Onions.
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Santa Cruz California
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I just went ahead and got buzzers with a lower voltage rating. Now I have to find the right resistance to bring the level down to what I want.  smiley-roll
« Last Edit: August 20, 2011, 11:46:01 pm by TheNorm » Logged

Grand Blanc, MI, USA
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I'd be interested to know which buzzer(s) you're using. Haven't been happy with ones I've tried so far. I'm looking for loud...
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Grand Blanc, MI, USA
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LOLZ!  THAT'S what I'm talking about!
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MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

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It's actually a speaker rather than a piezo buzzer. It's larger and took some hassle to make it fit into the space available.
http://www.pololu.com/catalog/product/1261
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Thanks!
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It's actually a speaker rather than a piezo buzzer. It's larger and took some hassle to make it fit into the space available.
http://www.pololu.com/catalog/product/1261


It's rated as 100 ohm speaker, you should probably wire a series 100 ohm resistor to protect the output pin. That will cut sound level in half but maybe still enough?

Lefty
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