home :: categories :: audio :: tone-and-volume-control :: 5 band graphic equalizer

How to build 5 Band Graphic Equalizer

August 8, 2010 - category: Tone and volume control

Description

Other one unit of graphic EQ. five bands. The basic difference with the other circuits is, that I use instead of IC, transistor and the power supply, go up in +/- 24V DC, ensuring low distortion and bigger margins of overloading. With switch S1, we can isolate the EQ. inside or except operation, leaving the musical signal to pass without no alteration.

Circuit diagram

Part list

R1-4-37= 330Kohms
R2-7= 2.2Kohms
R3= 120Kohms
R5-6= 6.8Kohms
R8....12= 1.8Kohms
R13....15= 200Kohms
R16= 180Kohms
R17= 150Kohms
R18= 1.5Kohms
R19....22= 1Kohms
R23....27= 220Kohms
R28....32= 15Kohms
R33= 10Kohms
R34= 15Mohm
R35-38= 220 ohms 1W
R36= 100 ohms
C1-3= 1uF 40V
C2= 68pF 100V
C4= 220uF 63V
C5= 1uF 100V
C6= 220nF 100V
C7= 47nF 100V
C8= 15nF 100V
C9= 5.6nF 100V
C10= 47nF 100V
C11= 15nF 100V
C12= 4.7nF 100V
C13= 1.5nF 100V
C14= 470pF 100V
C15= 68pF 100V
C16-19= 100nF 100V
C17-20= 470uF 40V
C18= 4.7uF 63V
RV1....5= 50Kohms Lin.
Q1.....7= BC550C
S1= 2X2 SW

circuit from http://users.otenet.gr/~athsam/EQ_3.htm

If you liked this page please consider sharing. Thanks!

Previous and next post from Tone and volume control

3 Band Equalizer

6-Band Graphic Equalizer