Here’s a Easy Audio amplifier utilizing a single IC AN7523. This amplifier provides an output energy of three Watt in to an 8 Ohms loudspeaker on energy provide of 9Volts.
An IC AN 7523 is a 9-pin legs IC. This IC 7523 is quite common and accessible in a market simply and likewise shouldn’t be costly.
Circuit Description
The circuit proven is easy and straight ahead. Just one semiconductor IC1 (AN7523) is used on this amplifier and few passive elements like C1, C2, C3 and C4 and resistors R1 and R2.
Pin 1 of IC1 (AN7523) is linked to +9Volts energy provide. An electrolytic capacitor C1 (470uF/25V) is linked to +9V and floor by dealing with constructive terminal to +9V and unfavorable terminal to floor.
Pin2 and three of IC1 (AN 7523) is linked to eight ohms/3W speaker. Pin 3 is linked to floor.
Pin 5 is linked to +9V although a resistor R1 (47K). Resistor R2 ( 33K) and capacitor C3(10uF/25V) are linked between pin 5 and seven.Pin 7 is linked to floor. An electrolytic capacitor C4 (1uF/25V) is linked between pin 9 and pin 7 by dealing with constructive terminal to pin 9 and unfavorable terminal to floor.
Pin 6 of IC1 is and AF enter terminal. A variable resistor VR1 (10K) linked to a unfavorable electrolytic capacitor C2 (1uF/25V) and floor. A middle pin of VR1 (10K) is linked to enter terminal.
Building and Adjustment
A PCB board given is appropriate for constructing your amplifier. After making a PCB at first take an 18 pin IC and lower it in half. Now put the half of 18-pin IC on a PCB board and solder it. Don’t insert an IC socket throughout soldering. Take a 2-pin IC socket and join it to speaker terminal of amplifier. Take an AF socket and join it to an AF enter terminal o amplifier. Now take all of the remaining elements and place them and solder all of them.
Now take an influence provide of 9Volts and join it to energy provide terminal of amplifier.
Take an 8 ohms/3W speaker and join it to the speaker terminal of the amplifier. Rotate a VR1 and put it in center terminal.
You’ll hear a buzzing sound popping out from a speaker whereas touching an enter terminal with a small metallic screwdriver.
Now your amplifier is working and prepared to be used.*
Elements Listing
IC1: AN 7523
Resistors
R1:47K
R2:33K
VR1:10K (preset)
Capacitor
C1: 470uF/25V
C2: 1uF/25V
C3:10uF/25V
C4:1uF/25V
Miscellaneous
9Volts battery, 18-pin IC sockets, 2-pin socket, 2-pin connector, wires, 8 ohms/3W speaker. t.c.