Piezo transducer and Arduino

Other Hardware LEDs and Multiplexing
1

Hey guys,

I am new to Arduino, however I am pretty familiar with programing.

I have Arduino Mega and I would like to control piezo disc using my Arduino board. My question is what's the best way to do it? What's the switching frequency between LOW and HIGH levels I can get with Arduino?

Cheers,
B.

2

Make sure you see the Tone reference: http://arduino.cc/en/Reference/Tone

I'm unsure what the maximum frequency would be but it'd be well out of audible range or the capability of the piezo.

3

I am looking into frequencies from 1MHz up to 5MHz, is it possible to switch between low and high state that fast?

4

Only 1, 2, and 4 Mhz sharp. Look for external hardware IC: http://store.nkcelectronics.com/breakout-for-ad9835-signal-gener9835.html

5

Thanks Magician,

Maybe 4 MHz will be good enough for my application, can I get it with tone? Or do I have to use different command?

6

No Tone, direct setting Timer control registers. I'd not advise you to read data sheet of atmega cpu here, you wouldn't find clear technical specification no real practical examples, but you could use it for reference.
Good book will help you to start:

Arduino Internals