FREE CIRCUIT DIAGRAMS 4U: 3 Band graphic equalizer circuit

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Monday, September 28, 2009

3 Band graphic equalizer circuit

This is a 3 brand graphic equalizer circuit. By using this circuit you will be able to get the maximum advantage.The high input impedance of the IC makes this circuit compatible with most of the audio signal sources.The filter network can produce a +/- 20 dB enhancement or cut on the three frequency bands 50Hz,1KHz and 10KHz.POTs R1, R2 and R3 can be used for adjusting the gain of the different bands.

NOTICE:

# The Circuit can be powered from anything between 6 to 30V DC.
# I am using 12V here.
# Increasing supply voltage will of course increase the gain.
# The IC must be mounted on a holder.
# The electrolytic capacitors must be rated higher than the supply voltage.