Tone Control


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This simple tone control can be used in may audio applications. It can be added to amplifers, used as a stand alone control module, or even built into new and exciting instruments. It's one IC construction makes it a very compact circuit, as only a few support components are required. Plus, it does not use a dual power supply. This means that the circuit will run from 9V to 15V (although the bass will be a little weak at 9V). The circuit is by Robert Barg and originally appeared in the Think Tank column of the May 1998 issue of Popular Electronics.

Schematic

Schematic for tone control

Parts

Part
Total Qty.
Description
Substitutions
C1, C3, C5, C7, C15, C1662.2uf Electrolytic Capacitor
C2, C620.05uF Ceramic Disc Capacitor
C410.22uF Disc Capacitor
C8, C1020.015uF Ceramic Disc Capacitor
C91100uF Electrolytic Capacitor
C11, C12, C13, C1440.1uF Ceramic Disc Capacitor
R1, R4210K 1/4W Resistor
R2, R5233K 1/4W Resistor
R3, R624.7K 1/4W Resistor
R712.2K 1/4W Resistor
R8, R9, R10, R11450K Linear Pot
U11TDA1524A Tone Control IC
S11SPST Switch
J1, J2, J3, J44RCA JacksOther connectors of your choice
MISC1Board, Wire, Knobs, 18 Pin Socket

Notes

  1. S1 is a contour control. Volume is controlled by R11. Balance is controlled by R10. R9 and R8 control bass and treble, respectivly.
  2. J1 is the left input, J4 is the right input. J2 is the left output, J3 is the right output.
  3. The circuit is designed to accept line level or mic level inputs. if you are going to be using a stronger signal, a voltage divider will be necessary to cut it down to proper levels.
  4. You can, of course, skip J1-J4 if you plan to integrate this circuit into another.

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Comments

anonymous: ahmed attia
Tone Control
Saturday, May 10, 2008 4:22:28 AM
can this circuit apply to power amplifier to give us high gain and high triple quality, the VCC will only +9 volts or can us use the rang to +15 V, we need pcb of this circuit. Ahmed Attia
anonymous
Tone Control
Wednesday, December 12, 2007 12:38:49 PM
Pls, I'll like to know about vocal tone control. Every thing about it if possible. Thanks.
anonymous
Tone Control
Monday, November 26, 2007 7:51:38 AM
what is the voltage of the electrolytic capacitor of this tonecontrol
anonymous
Tone Control
Thursday, October 18, 2007 3:34:26 AM
What a lazy bunch of lamers. Why don't they get the spec. sheet and figure it out themselves? http://www.ortodoxism.ro/datasheets/philips/TDA1524A_CNV_2.pdf
Ehsan
Tone Control
Friday, August 24, 2007 1:06:24 PM
I built this tone control and I installed that in my car. But it is noisy.I omitted the LM7812.How can I reduse noise when car motor is working?
au cacho
Tone Control
Thursday, August 16, 2007 6:44:14 AM
how can i add a switch for choosing a mono or stereo and wat is the gain of the circuit? would it be good to use this tone control for a 100W amplifier? can you put labels on the schematic.
Jack Daniels
Tone Control
Saturday, June 23, 2007 3:25:29 AM
Can you please explain what is the gain levels of the frequencies, and what need to tweaked to have higher base gain since the Bass response is slightly low. please provide the technical spec of the U1. Please let us know and share the schematic diagram whether Mid Frequency control can be incoperated in this circuit ....?
victor stanvic
Tone Control
Friday, June 08, 2007 6:40:03 AM
i only saw one wire on the 9V/ 15V power supply. which wire is positive and which one is negative? . Secondly, among the jacks, which of them is the input and the output? Which kind of plug can one use on it. Thanks, i believe my request for more explaination will be granted in due time.
rerererererrerrerrrerererereeeffef
Tone Control
Thursday, May 03, 2007 2:52:28 AM
block diagram must be provided and actual drawing
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