how to make 12 voltage amplifier circuit?

12 voltage amplifier using transistor TIP41 and TIP42

This is a mini amplifier circuit diagram. this circuit run from 10 voltage to 18 voltage. normally we can use 12 voltages. we can use 12 voltage battery also. here used 2 transistors only. tip41 is an NPN transistor and Tip42 is a PNP transistor. it’s one pair transistor that can make a maximum of 50 watts. it also depends on amplifier voltage and amperes. 

We know that Voltage X amperes = Watts.  so if we use 12 voltage and 2 amperes then we will get.  12 X 2 = 24 watts. or if we use 12 voltage 4 amperes then we get 12 X 3 = 36 watts. but we have to know we can’t use 4 amperes. because 2 transistor maximum can take 3 amperes. we can use 18 voltage 3 amperes. then 18 X 3 = 54 watts.

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