Simple Basic Audio Amplifier Circuit Using 1 MOSFET Transistor

Introduction: Simple Basic Audio Amplifier Circuit Using 1 MOSFET Transistor

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First, watch the video till its end then you will understand everything.

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Step 1: Circuit Diagram

Here is the circuit diagram guys.

you can also make it by joining some simple components.

sound Quality is Desert at low Number of the components.

Step 2: Here Is a Picture While Playing

Here are some essential Link:

HI-FI 240W audio amp:

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Needed Components Online Link-

1. N-Channel MOSFET


IRF840B (I used this in this article)

2. Soldering Iron

3. 3.5mm Headphone Jack

4. Speaker

5. 2.2k 1/4w Resistor

6. 1uf Capacitor

7. 18650 Battery

8. Wires

9. Heat Shrink Tube

**Note: Use Heat shrink tube for making all connections Secure.

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    2 Discussions


    1 year ago

    I would see the video, if I could!
    I am using an Android tablet for the "Instructables", with the desiged app for this.
    (see Google play )
    It is NOT possible to "switch" to the embedded video-link, inside a picture. You must write/print the original "blue" video-link in front, behind, or something else in an other way, that people like me, can watch your, and other videos,...! Sorry for my bad English, it is not my native tounge, and the "AUTO-CORRECTING" , is doing a Bad job, when I try to write English, with the the "German-Grammar" switched on,....

    73 de db9pz ; Markus (my HAM-radio call , it means : many greetings,...)

    Creative creator
    Creative creator

    Reply 1 year ago

    Sorry For My Mistake Here is the video link:

    use Google chrome for Instructables.

    instructables does not have an official app

    the app was made by 3rd party user can steal your data.

    Better to use google chrome in desktop mode.