Amplifying feeble AC voltage from small coil which is having the presence of magnet

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varunme

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Amplifying feeble AC voltage from small coil which is having the presence of bar magnet, which i want to use as a sensor of movement

someone help me in making in amplifier, can i build with opamp ?
 

You can use any amplifier design But with out knowing the exact input Voltage and the op power you need no one in this earth can help you to find a solution

Do post the signal strength of the feeble signal you get and also the strength of the op signal you need
 

when moving the magnet very fast ( actually its an encoder in a magnet) , multimeter shows 1V , i like to get 5V so that can be fed to uC
 

Use an LM741 in inverting amplifer configuration That should do the job for you

Use Rf = 5k and the Ri around 1k for getting the desired output
 
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    varunme

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This is true so you can use it

Here you will use a single supply but the same design procedure as that of the Lm741
 
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    varunme

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