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Steve Davis
PostPosted: Mon Jan 03, 2011 12:46 pm 
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Can one use a software sig gen and computer to do Chladni work ?
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mhammond
PostPosted: Mon Jan 03, 2011 2:26 pm 
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You need an amplifier with 15-20 Watts to drive the speaker, I use my laptop to drive an old stereo amp. A typical sound card doesn't have enough grunt.....
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Pat Foster
PostPosted: Mon Jan 03, 2011 2:44 pm 
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What Mikey said. There's a lot of free signal generator SW out there, for Windows and Macs. The ones I've fed into an oscilloscope all gave accurate enough waveforms.

Pat

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arie
PostPosted: Mon Jan 03, 2011 3:26 pm 
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radio shack used to sell a turntable pre-amp pretty cheap. they might still.
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Andy Birko
PostPosted: Mon Jan 03, 2011 5:11 pm 
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arie wrote:
radio shack used to sell a turntable pre-amp pretty cheap. they might still.


For this application, you need a power amp, not a pre-amp. Signal coming out of a PC is line level or headphone. Now you need the 10 to 20w to drive the top.

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TomDl
PostPosted: Tue Jan 04, 2011 5:15 am 
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My computer store has speaker sets/ipod speaker, that have a lot of drive, don't know if that would be enough.
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Alan Carruth
PostPosted: Tue Jan 04, 2011 2:49 pm 
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Find the wattage rating. As has been said, you'll need something like 12W out of one channel, and more is nice.
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