6 Band Graphic Equaliser Using 741 Op-Amp IC
With this circuit you can control and blend frequencies and tones as desired.
Essentially, the circuit consists of an IC 741 whose gain at various freguencies is determined by corresponding potentiometer setting.
The audiblefrequency spectrum is covered in six steps: 50Hz, 160Hz, 500Hz, 1.6kHz, 5kHz, 16kHz. All potentiometers are of 100kΩ linear type. The circuit provides adequate boost / cut for normal use.
|R1, R2, R3, R4, R5, R6||27kΩ|
|VR1, VR2, VR3, VR4, VR5, VR6||100kΩ|
|IC1||741 Op amp|
power supply for the circuit can be derived from the amplifier / preamplifier itself. The wide rangeof supply voltage (6V-15V) makes the circuit very versatile. Power consumption is negligible.
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