Introduction
Every public addressing events employ a microphone and speaker, as it is a vital part of any public event. In many events, speakers just play music from any music player or mobile phone. So, if you are a beginner student of electronics or have an interest in electronic devices and circuits, then you must have thought that how the internal circuitry of this may work. Basically, these kinds of systems have amplifiers in them which amplify the audio signals coming from any device or human vocals. In simpler words amplifiers increase the low-power input electronic audio signals at the output. To understand how the basic amplifier works, this article will make a “Simple Basic audio Amplifier”
Hardware Required
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | MOSFET | IRFZ44N | 1 |
| 2. | Speaker | – | 1 |
| 3. | Headphone Jack | 3.5MM | 1 |
| 4. | Capacitor | 1uF | 1 |
| 5. | Resistor | 2.2K | 1 |
| 6. | Li-Battery | 3.7V | 1 |
Circuit Diagram
Working Explanation
Connect the Simple Basic audio Amplifier according to the diagram attached to this article. Remember that the adapter wire has three wires, and we need only two wires, so use the ground one for the ground and use any other wire as signal wire. After the proper connections, provide the power supply to the circuit. Now, connect the adapter to your mobile phone and play audio. The signal coming from the headphone jack adapter triggers the base of an N channel Mosfet, wired in the circuit. This N-channel Mosfet amplifies the input signal. Thus, the drain of the Mosfet drives the speaker at the load.
Application and Uses
- It can be used in electronic instruments like electronic keyboards and guitars.
- It can also be utilized in sound systems for various events.
- The circuit can be adopted in children’s gadgets and toys, etc.
