Electronics Online

The following diagram is the circuit diagram of power audio amplifier which build based on Philips chip TDA1514A. The the circuit is able to deliver single output power up to 50 Watts.

About TDA1514A:
The TDA1514A integrated circuit is a hi-fi power amplifier for use as a building block in radio, tv and other audio applications. The high performance of the IC meets the requirements of digital sources (e.g. Compact Disc equipment).

The following circuit is a 18W audio amplifier based on HA13118 which is designed for car audio system. You may use this circuit for home audio sound system.

Resistors :
R1, R2 = 2R2 ohm

Capacitors :
C1, C2, C4, C5, C6 = 100uF/16V
C3 = 10uF/16V
C7, C8, C12 = 100nF
C9 = 2,200uF/25V
C10 = 1uF/50V
C11 = 100pF

Misc.
I.C. = HA13118
Heatsink

The following circuit is inexpensive, easy and very simple. Generally, this audio amplifier that can be used for computer, CD player or other devices that have a headphone output.

Schematic Diagram:

Component part list:
P1 = 10K Log.Potentiometer
R1, R2 = 33K
R3 = 33R
R4 = 15K
R5,R6 = 1K
R7 = 680R
R8 = 120R
R9 = 100R Trimmer Cermet