Electronics Help Care Amplifier circuit diagram Amplifier circuit diagram using STK4199MK2:
This is an amplifier circuit diagram using STK4199MK2. It’s a 2.1 audio circuit. It has 3 inputs and 3 outputs. Left speaker + Right speaker and the Subwoofer output. Voltage needs 55-35-0-35-55. Positive voltage high and low. negative voltage, high, and low. This diagram has no low-pass filter for the subwoofer. Here in this post, we can get a subwoofer link.
Low-pass filter for subwoofer amplifier:
This is the low-pass filter for the subwoofer amplifier. This circuit needs to make a bass amplifier. We also need to make a 2.1,5.1 audio sound system. This board makes only bass. makes only the low part. It has no mid-range or high part. It’s also a pre-amplifier. It’s output mono. Input stereo but output mono. This board runs on 9 volts to 15 volts. It needs a single voltage. For this, we can use this board in the car amplifier.
This is the Speaker protection circuit diagram. It can protect our Speaker from burns. 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
This is the DIY amplifier circuit diagram using transistors. This circuit can deliver up to 300 watts. It’s a mono circuit board. For a stereo have to use 2 boards. Here, use PNP and NPN transistors. Any transistor can be used in this circuit. The supply should be a minimum 25-0-25 voltage and a maximum 80-0-80 voltage.
The 2SC2922 is a high-power NPN Silicon Bipolar Junction Transistor (BJT) specifically designed for use in the output stages of audio power amplifiers and general-purpose power applications. It is a very popular choice among audio enthusiasts for high-fidelity (Hi-Fi) amplifier projects.
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