Download Skema equalizer :3 Band Equalizer
A classic circuit of regulation of tone of three way, with which
we can regulate low, mid and high frequencies, of acoustic signal. The boost/cut can be
regulated in the range of ± 18 dB/oct. In the circuit the supply is ± 15V, but can be
also supplied with alone supply + 9 until + 30V, it is enough it is connected pin the 4
IC1, in the 0V and is connected the circuit with as it appears in fig. 2, giving half the
supply in the not inverting entry of IC1, in the 5 and 3 equivalents, which are henceforth
not connected in the ground.
3 Band EQ with single supply
|
| R1-2= 47Kohms | C1-11= 10uF 25V | C8= 1.2nF 63V MKT |
| R3-4-5-12-13= 10Kohms | C2= 33pF ceramic | C9-10= 100nF 63V MKT |
| R6-7= 3.3Kohms | C3= 2.2uF 63V MKT | C12=47uF 25V |
| R8-9= 1.8Kohms | C4= 47nF 63V MKT | RV1-2= 100Kohms Lin. |
| R10= 270ohms | C5-7= 4.7nF 63V MKT | RV3= 470Kohms Lin. |
| R11= 22Kohms | C6= 22nF 63V MKT | IC1= TL072, NE5532 |
