Mini amplifier circuit using LA78040:
This is a Mini amplifier circuit using LA78040. It’s a stereo audio board. We can use a maximum AC24 voltage. This circuit can make 9+9 watts of output. It’s a mini circuit board. We can also use a DC 24-volt.
TDA2050 MONO BRIDGE:
This is the TDA2050 MONO BRIDGE amplifier circuit diagram. This is a mono amplifier circuit diagram. Here we can use 12 volts to 24 volts. This circuit can make 32 watts of output. here used TDA2050 IC. We can also use the TDA2030 IC. Here needs a single voltage is needed.
This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. If the amplifier has any problems, this circuit can save our soundbox. Normally, when the transistor makes a short circuit, the voltage comes out from the speaker output line, and this circuit protects that voltage. This circuit should not allow direct voltage to be sent to the speaker. This circuit is essential for protecting the speaker.
2.1 Home Theater Circuit Diagram. Normally, we use this circuit in a computer soundbox. Here, the TDA2030 IC is used. One is for the bass speaker. Another 2 is for a surround speaker, one for the right speaker, and another for the left speaker. for this circuit need 12-0-12 to 18-0-18 voltage. Here, 4558D is used for making a low-pass filter.
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