hello,
i just have to build a bass, terrible and mid controller (passive ) circuit..
now i have to set a decible adjustment of the output with (+,-18dB)
what calculations should i have to make to get the adjustable (+-18dB) output..???

 

Is this a color organ or a tone control?

 

I JST HAVE MADE THE DESING OF TONE CONTROL USING OP-AMP,NW THE PROBLEM IS:
CAN I USE LM 324 (QUAD)AS A NORMAL OP-AMP APPLICATION?
I AN IN CONFUSSION BECAUSE IT DOSNT HAVE ANY -vcc OPTION,JST A +vcc AND A GROUND OPTION..
SO CAN I USE IT FOR A TYPICAL APPLICATION WHERE 4 OP-AMPS ARE USED??

 

Yes, you can use a quad. You only have to use one of the opamps on the chip.

If you look on the LM324 datasheet, it will show you which pins hook to each opamp in the package.

be sure to connect all unused pins to ground.

 

retched,

i could have sworn you answered this question twice...

 

Im multi-talented..or forgetful..

 

Yes, you can use a quad. You only have to use one of the opamps on the chip.

If you look on the LM324 datasheet, it will show you which pins hook to each opamp in the package.

be sure to connect all unused pins to ground.

but how can i connect the -vcc to the op-amps????as i have studied that op-amps have both the +ve and -ve supplies...but this is have jst +ve input and ground:s

 

Have you read the datasheet?

Read about biasing.

Here is a copy:
http://www.national.com/ds/LM/LM124.pdf

 

Is this a color organ or a tone control?

its basically a tone controll.

 

Hello,

Do you have a schematic of the tone control?
Can you post it, so we can have a look at it.
Or are you looking for one?

Bertus