electronics-amplifier tutorial

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 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

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