Recommendation for audio feedback.

Anonymous · ‎Mar 17, 2015

Hello,

I have tried to find dedicated forum for newely launch MBR series but could not find it. Hence I am posting this question here in this form. Accept my apology for this. We have got newely launched CY8CMBR3110 chip and we have developed custom boards using this chip. Its working like a charm. Now we want to provide audio feedback for touch. As CY8CMBR3110 has dedicated buzzer pin we are planning to use that pin only. I think to use piezo buzzer will not be the best solution as sound produce by piezo buzzzer could be annoying. So I am looking for various options which can generate very good audio feedback. What is best way to achieve this? Is there any other ICs available which can be used?

Thanks,

Niral

ETRO_SSN583 · ‎Mar 17, 2015

Having looked at the wrong part (me) the best way to make

a buzzer sound non raspy is twofold -

1) Pick it for a natural resonance in the range you want. That maximizes

loudness.

2) RC filter it to suppress harmonics, the principal cause of crappy

sound.

3) Plastic enclosure also helps in shaping the overall sound quality

properties.

Drive it differentially to maximize loudness. When you do place

diode clamps to each rail on the GPIO pin to eliminate transients

on the GPIO pins outside their allowed range.

Regards, Dana

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Recommendation for audio feedback.

Recommendation for audio feedback.

Re: Recommendation for audio feedback.