Electronics Help Care electronics circuit diagram
DIY amplifier circuit diagram:
DIY amplifier circuit diagram using tip41 and tip42. This board can produce 20 watts using 12 voltages of 2 amperes. the transistor needs a separator with the heatsink. We can also use other transistors like c2073 and a940.
Type Designator: TIP41
The material of the Transistor is Si
The polarity is NPN
The maximum Collector Power Dissipation is 65W
The maximum Collector-Base Voltage is 80V
The maximum Collector-Emitter Voltage is 40V
The maximum Emitter-Base Voltage is 5V
The maximum Collector Current is 6A
The max operating Junction Temperature is 150 °C
The transition Frequency is 3MHz
The forward Current Transfer Ratio is 20
Type Designator: TIP42
The material of the Transistor is Si
The polarity is PNP
The maximum Collector Power Dissipation is 65W
The maximum Collector-Base Voltage is 80V
The maximum Collector-Emitter Voltage is 40V
The maximum Emitter-Base Voltage is 5V
The maximum Collector Current is 6A
The max operating Junction Temperature is 150 °C
The transition Frequency is 3MHz
The forward Current Transfer Ratio is 20
This circuit doesn’t have speaker protection. here need a speaker protection circuit. here is the link to get the speaker protection circuit. Diagram is here
This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. if the amplifier has any problem then this circuit can save our soundbox. Normally when the transistor makes a short circuit the voltage comes out from the speaker output line then this circuit protects that voltage. This circuit should not allow any direct voltage to be sent to the speaker. This circuit is very important for protecting the speaker.
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