Electronics Help Care electronics 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.
The diagram of this circuit is here Download link
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
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