Mini Amplifier Circuit
Mini Amplifier:
This mini amplifier which is TDA2822M IC making simple and compact in size and also used for laptop speaker amplifier. This circuit can operate small voltage 3 volts to 9 volts and also carry with us.
Description:
The input is taken from pin no.4 through variable resistor VR1 and capacitor C4.
The variable resistor VR1 is used to select the Range of signal. Capacitor C2 and C6 are used to filter and quality where capacitor C3 and C5 is used to bias the audio frequency.
The output of amplifier IC is obtained at pin 1 where resistor R4 and capacitor C8 is used as feedback component. The output is given to loudspeaker through capacitor C7 in order to produce sound.
Components:
- Resistors – R1 = 10 KΩ
R2 = 47Ω
R3 = 220Ω
R4 = 1Ω
VR1 = 50 KΩ -
Capacitors – C1 = 470 pF
C2 = 220 µF/10V
C3 = 100 µF/10V
C4 = 0.1 µF
C5 = 10 µF/10V
C6, C7 = 470 µF/10V
C8 = 0.1 µF
Semiconductors- IC1 = LM1895N
Miscellaneous – LS1 = 4Ω/1W speakerTags: mini amplifier circuit board, 3v audio amplifier circuit diagram, 10w mini audio amplifier circuit, 6 volt audio amplifier circuit, how to make a mini amplifier at home, audio amplifier circuit diagram with layout, simple amplifier circuit diagram using transistor, 20 watt amplifier circuit
