High Gain Microphone Pre Amplifier
Posted On Saturday, April 28, 2012 at at 3:06 PM by OwnerThe best and cheap Pre-Amp circuit to make Microphone more sensitive to pick voice, although I had made one already but thought it worth try as it has nice gain around 100 as the author stated with a new chip TL071 which is low voltage high gain amplifier IC.
A little modification I made as you see some extra components are basically power supply using regulator chip LM7809 as I need it to run with 12V DC. This stand alone 9V regulator can be found here...
Schematics:
![highgain preamp-TL071_thumb[1]](http://lh5.ggpht.com/-ATfbLXrQg90/T5vA9DwN47I/AAAAAAAAA1s/hJIrLC7hBN4/s1600-h/highgain%252520preamp-TL071_thumb%25255B1%25255D%25255B2%25255D.jpg "highgain preamp-TL071_thumb[1]")
Finished Circuit :
![MicPreamp-TL071-Circuit_thumb[1]](http://lh6.ggpht.com/-jxCh9960HI4/T5vBASmRzbI/AAAAAAAAA18/mIqmQpmX2D8/s1600-h/MicPreamp-TL071-Circuit_thumb%25255B1%25255D%25255B2%25255D.jpg "MicPreamp-TL071-Circuit_thumb[1]")
