Electronics Help Care Amplifier circuit diagram Amplifier circuit diagram using STK412-170:
This is an amplifier circuit diagram using STK412-170. This board can make a maximum of 180 watts + 180 watts. It needs dual voltage with high and low: positive high volts + positive low volts + Gnd + negative low volts + negative high. It needs 70+35+0+35+70 volts. It’s a stereo circuit diagram.
The Component list is here
C1/C2/C7/C8=100v/220uf, C6/C4/C10=100v/100uf. C5/C9=50v/2.2uf. R1/R17=100, R2/R15=3.3k, R8/R9/R10/R11=0.22/5w, R3/R18=4R7, R4/R16=56k, R5/R14=1.8k, R7/R12=1k, R13/R6=56k, Z1/Z2=18volt, P1/P7=100n, P4/P5=470pf, P3/P6=3pf, P2=220pf,
Amplifier circuit using STK412-150:
This is one of the best Amplifier circuits using STK412-150. This diagram can make 200+200 watts. using 70-35-0-35-70 voltage. Positive high positive low, negative high, and negative low voltages are used here in this diagram. stk412-150 ic can make 200+200 watts using dual voltage. It’s a stereo audio amplifier.
This STK amplifier circuit uses the STK 022 IC, which can make 15 watts. We can convert AC 12-0-12 voltage to AC 18-0-18 voltage, and we can use DC 25-0-25 voltage at the maximum. Here, use dual Ic to make a stereo amplifier. 15Watts + 15watts.
This is an amplifier circuit diagram using transistors. Here, the C5198 and A1941 transistors are used. We can also use other transistors. any pair of NPN and PNP. like 2sc5200 and 2sa1943. It’s a mono audio circuit diagram board. This circuit can make a maximum of 400 watts. It depends on the voltage and amperes. If we use 35-0-35 voltage and 5 amperes. Then we get the output 35X5=175 watts. or 50-0-50 volts and 5 amperes. Then the output will be 50X5=250 watts.
The diagram of this circuit is here Download link
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
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