Go Down

Topic: Hi need help, suggest me a preamp circuit for realtime audio processing. (Read 1 time) previous topic - next topic

dsese1234

Hello guys,

I am looking for the best preamp for guitar using TL082 or lm358. i saw a link http://audio.circuitlab.org/2012/06/simple-preamp-mic-using-lm358.html. but i never try this. what i have now is TL082 IC to make the preamp for guitar.  i want to use this sketch for a while.http://interface.khm.de/index.php/lab/experiments/arduino-realtime-audio-processing/

any recommendation?

Thanks in advance!

DVDdoug

Do not use that circuit...  It's a special circuit that supplies DC power to an electret microphone.  You do not want to feed DC power into your guitar's pick-up coil.   It also probably has way too much gain (except when the gain is turned way down).

The TLO82 is fine if you want to build a preamp.

With the proper impedance (1 Megohm or more) an electric guitar will put-out about 1 volt, and you may not need a  preamp.   (The Arduino's ADC has very-high input impedance.)   

If you are driving a regular power amp (with an typical input impedance of 10K - 100K) a buffer amplifier made with any standard op-amp will give you high input-impedance and low output-impedance, but with no signal gain (gain =1.0).

If you do need some gain/amplification, a non-inverting amplifier made with any op-amp will have very-high input impedance, and a gain 10 or less should be sufficient.

dsese1234

Thanks DVDdoug,

i have found a circuit preamp for TL082, this one? .

do you think this is work?



marco_c

Have a look here http://www.generalguitargadgets.com, they have a projects section.
Arduino libraries http://arduinocode.codeplex.com
Parola for Arduino http://parola.codeplex.com

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy