Very simple 25W audio amplifier
In this video we will learn how to make a small and very simple audio amplifier of up to 25w.
This small amplifier is designed to be able to support the entire frequency range, although preferably the bass.
It has an efficiency of no more and no less than 47% which is very high for a class A amplifier.
We can also apply speakers with an impedance of 2 ohm to 8 ohm.
MOSFET transistor IRF540N (you can use similar N-Channel MOSFET)
47K 0.25W or 0.125W (it is not critical, you can use a 10K - 100K resistor)
12 Volts 21 Watt light bulb. A light bulb works like a powerful resistor. It is difficult to find for example a 21W resistor, that is why I use a lightbulb instead. You can use 1W - 40W light bulb. The more powerful light bulb you use the more powerful amplifier you'll get. But for a powerful amplifier you will need a powerful power source as well, and a big heatsink.
4.7uF capacitor. (2.2uF to 10uF capacitors will work fine as well)
1000uF capacitor. (470uF to 2200uF capacitors will work fine as well.
The power source can be a 12V battery or a 12V DC power supply.
If you use a 21W lightbulb then your power supply has to provide at least 2A of current.
After you connect the power, the lightbulb should turn on.
Very simple 25W audio amplifier
In this video we will learn how to make a small and very simple audio amplifier of up to 25w.
This small amplifier is designed to be able to support the entire frequency range, although preferably the bass.
It has an efficiency of no more and no less than 47% which is very high for a class A amplifier.
We can also apply speakers with an impedance of 2 ohm to 8 ohm.
MOSFET transistor IRF540N (you can use similar N-Channel MOSFET)
47K 0.25W or 0.125W (it is not critical, you can use a 10K - 100K resistor)
12 Volts 21 Watt light bulb. A light bulb works like a powerful resistor. It is difficult to find for example a 21W resistor, that is why I use a lightbulb instead. You can use 1W - 40W light bulb. The more powerful light bulb you use the more powerful amplifier you'll get. But for a powerful amplifier you will need a powerful power source as well, and a big heatsink.
4.7uF capacitor. (2.2uF to 10uF capacitors will work fine as well)
1000uF capacitor. (470uF to 2200uF capacitors will work fine as well.
The power source can be a 12V battery or a 12V DC power supply.
If you use a 21W lightbulb then your power supply has to provide at least 2A of current.
After you connect the power, the lightbulb should turn on.
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