This circuit is 6 Band Graphic Equaliser ,you can adjust sound in low ,mid and high which circuit used IC 741 Op-Amp.
6 Band Graphic Equaliser Circuit with IC 741 Op-Amp:
Audible Frequency spectrum is treated in six bands: 50Hz, 160Hz, 500Hz, 1.6kHz, 5kHz, 16kHz. All potentiometers are linear type of 100k. The circuit offers a lot of cut / boost for normal use.
Parts List :
R1, R2, R3, R4, R5, R6 27k?
R7 470k?
R8 330k?
R9 100k?
R10 4.7k?
R11 4.7k?
VR1, VR2, VR3, VR4, VR5, VR6 100k?
C1 100n (104)
C2 33n (333)
C3 10n (103)
C4 tiga.3n (332)
C5 1n (102)
C6 300pF (301)
C7 100µF 16V
C8 4.7µF 16V
C9 47µF 16V
IC1 741 Op amp
Power for the circuit of the amp / preamp itself derived. The wide range of power supply (6V-15V) makes the circuit very versatile. The power consumption is negligible.
