Electronics Help Care Amplifier circuit diagram
This is the DIY amplifier diagram using the STK4191 IC. This IC can make 70w+70w audio output using 35-0-35 voltage and 3 amperes. It’s a stereo audio amplifier. In this circuit, we can use stk41 series. stk4121,stk4122,stk4141,stk4152,stk4191. But the voltage should be different. 25-0-25 voltage to 45-0-45 voltage, it depends on the IC number. But all diagrams are the same. We can use this circuit board for every ic.
This circuit needs dual voltage. positive, negative, and ground voltage. All resistors are 1 watt. All capacitors are 50 volts. The circuit diagram is here.
Amplifier Diagram circuit using STK4231:
This is the Amplifier Diagram circuit using STK4231. This amplifier makes 100watts+100watts audio output. STK4231+STK4211+STK4221 all IC diagrams are the same. Only the output watts are different. like stk 4141 series. Here needs dual voltage. We can use 15-0-15 voltage to 45-0-45 voltage depend on the IC. Positive, negative, and ground voltage are needed in this circuit diagram. It’s a stereo audio diagram.
Every amplifier needs a pre-amplifier with a bass tone controller. This circuit also needs a pre-amplifier. Here is the pre-amplifier. BASS TONE
And every amplifier needs a Speaker protection circuit board to protect the speaker. This circuit also needs a speaker protection circuit board. Here is the speaker protection circuit. Protection Circuit
The diagram is
must use a good quality transformer. good quality of diode and best quality capacitor to get the best output watts.
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