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Location: Rogue Valley, Oregon
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electronics question-not car related
Can someone tell me whether the voltage generated by a microphone do any work? Can it light a diode for example without amplification?
Thanks, Troy
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Troy Past: 1975 911S Silver Anniversary-rebuilt and sublime. Past: 1988 Carrera-backdated with a 3.6 and all the goodies. Present: 2011 GMC 2500HD with the 6.0 & 4x4!, 2004 Toyota Sequoia (wife's) |
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09-14-2004, 02:05 PM
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No - you'd need an op-amp/transistor circuit to amplify.
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09-14-2004, 02:23 PM
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Colin hit the nail on the head. You could use a FET switch that would be triggered by an input signal, but you'd still need an amp to make the voltage needed to light the diode.
Jason
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09-14-2004, 02:32 PM
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OK so there is too little current to get any work out of the signal from a microphone, correct?
thanks, Troy
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Troy Past: 1975 911S Silver Anniversary-rebuilt and sublime. Past: 1988 Carrera-backdated with a 3.6 and all the goodies. Present: 2011 GMC 2500HD with the 6.0 & 4x4!, 2004 Toyota Sequoia (wife's) |
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09-14-2004, 02:57 PM
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without the use of an amplifier circuit, yes.
Remember that the capsule vibration is being turned into the electrical impulse, not a lot of energy can be created by piece of foil ribbon or a foil diaphragm. Build a small amplifier (lots of stuff on-line and in tech books) and it will work like a champ. Jason
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09-14-2004, 03:04 PM
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If you want to do it yourself, check out the Forrest Mimms (sp?) books at Radio Shack. They are $5 or so, and have lots of building-block circuits like this. There's one that covers op-amp circuits.
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09-14-2004, 03:09 PM
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Thanks Guys!
Troy
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Troy Past: 1975 911S Silver Anniversary-rebuilt and sublime. Past: 1988 Carrera-backdated with a 3.6 and all the goodies. Present: 2011 GMC 2500HD with the 6.0 & 4x4!, 2004 Toyota Sequoia (wife's) |
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09-14-2004, 03:17 PM
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