Rangkaian TDA1524 Stereo Tone Control

Here is a stereo preamplifier circuit with built in tone control facility. A very useful circuit using versatile tone control IC TDA 1524 from Phillips.
Rangkaian TDA1524 Stereo Tone ControlRangkaian TDA1524 Stereo Tone Control
This circuit is designed as per the data sheet as an effective stereo-tone & volume control for car stereos , TV sets or any sort of stereo amplifier circuit you want.The circuit includes provisions like bass control, treble control , volume control with inbuilt contour or linear mode option (can be switched in betwwen) and balance. All these functions provided can be controlled by DC voltages or by linear potentiometers.


  • R1 ,R2 ,R3 andR4 can be used for controlling volume, balance, treble and bass respectively.
  • If SPDT switch S1 is in position 1 ,the circuit works in contour mode and in position 2 the circuit works in linear mode.
  • If you are using a 15-20V supply, you can use that as your pre-amp supply as well. Make sure you test the voltage first in all cases

TDA1524 Tone Control Component:

R1,R2                : 220R Resistor
R3,R4                : 4K7  Resistor
R5                   : 2K2  Resistor
R6                   : 1K   Resistor

C1,C2,C7,C8,C17      : 10 uF ecap
C3,C4                : 47 nF
C5,C6                : 15 nF
C9                   : 220 nF poly
C10                  : 100 uF 25V
C11,C12,C13,C14,C16  : 100 nF
C15                  : 1000 uF 35V
C18,C19              : 10 nF

IC1                  : TDA 1524A
IC2                  : LM 7812
P1                   : 50k linear switch pot
P2,P3,P4             : 50k linear pot
X1,X2,X3,X4          : RCA jack
D1                   : Diode 1N4004
L1                   : Red LED


Rangkaian Pengatur Volume Digital

Volume control is usually used Potensimeter. One drawback of the potentiometer is generated considerable noise, besides potentiometers also wear faster. To fix you can try using the following circuit. The circuit serves to replace your manual volume control in anamplifier. To adjust the volume size, you only need to press the Up or Down button. Following his schematics.
Rangkaian Pengatur Volume DigitalRangkaian Pengatur Volume Digital

  1. U1 you can get at Dallas Semiconductor.
  2. S1 to raise the volume, S2 to lower the volume.
  3. Input signal can not be less than -0.2 V.
This circuit can be used as a volume control, tone, contrast, brightness, and dimmer control. The circuit is extremely simple and compact requiring very Few external components with power supply Can Vary from 4.5V to 8V.

IC DS1669 Pinning

Pin Description IC DS1669

  • RH – High Terminal of Potentiometer
  • RW – Wiper Terminal of Potentiometer
  • RL – Low Terminal of Potentiometer
  • -V, +V – Voltage Inputs
  • UC – Up Contact Input
  • D – Digital Input
  • DC – Down Contact Input

Standard resistance values IC DS1669

  • DS1669-10 ~ 10 kΩ
  • DS1669-50 ~ 50 kΩ
  • DS1669-100 ~ 100 kΩ