microphone impedance detector

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dypotts

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Joined 2006
I need a circuit or a technique for detecting if an electret mic or dynamic mic is connected to the amp input to make appropriate gain adjustments. I thought about sensing the voltage and using comparators to control switches across gain resistors. Any ideas?
 
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Nigel Goodwin

Member
Joined 2005
lpilsley.co.uk
dypotts said:
I need a circuit or a technique for detecting if an electret mic or dynamic mic is connected to the amp input to make appropriate gain adjustments. I thought about sensing the voltage and using comparators to control switches across gain resistors. Any ideas?
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What's wrong with a volume control?.

The outputs from microphones tend to be fairly similar, and the normal input controls do all that's required.

What are you trying to do?.
 
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