Three ways to make Audio Amplifier Circuit – One/Two Transistors or LM 386 IC

Presenting three ways to make Audio Amplifier Circuit, that can amplify audio signals coming from mobile, laptop or any other electronic devise on connecting through AUX cable.

Circuit diagram and other details : https://www.instructables.com/id/Three-Audio-Amplifier-Circuits-Step-by-Step-Tutori/

Forewords (0:00)

1. Using Single Transistor (0:24)

Components Required :
• Transistors: BC 547
• Resistor: 10 K Ω
• Capacitor: 100 μF
• AUX cable
• Speaker

2. Using Two Transistors (1:54)

Components Required :
• Transistors: BC 547 (2)
• Resistors: 10K Ω
• Capacitors: 470 μF, 100nF (0.1μF)
• AUX cable
• Speaker

3. Using LM 386 IC (3:48)

Components Required :
• LM 386 IC
• Resistor: 10K Ω
• Capacitors: 220 μF, 100 nF (0.1 μF)
• AUX cable
• Speaker

Other Requirements :
• Battery: 4.5V
• Breadboard
• Breadboard Connectors

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