Simple audio Amplifier

Sound Amplifiering with simple tools (TIP41C Transistor NPN, two Capacitor 47 uF, Speaker, Resistor 2 kohm , 3.5mm Audio jack). This project is used to amplify the sound coming out of the phone or any sound source (microphone, laptop, computer, etc...). A very weak audio signal enters from the JP1 port. The signal passes through capacitor C1 which filters it of any static (DC) electrical charges and leaves only the varying sound waves. These weak waves reach the “base” of transistor Q1. The transistor works like a "water valve". The very small current of sound opens and closes the valve very quickly. This valve controls a much larger current coming from the battery (V1). The large variable current (which is an amplified version of the original audio signal) passes through speaker U1. Transformations of this current cause the speaker cone to vibrate, producing the audible sound.