Electronics Help Care Amplifier circuit diagram This is an amplifier circuit board using C4468 and A1695 transistors. It’s a mono circuit diagram. We can get 100 watts utilizing this board. For stereo, we need to use a dual-board setup. Here needs a dual voltage. positive, negative, and ground voltage. here need 35-0-35 voltage.
Here use of transistors is.
2SC4468
Polarity: NPN
Maximum Collector Power is 100 Watts
Maximum Collector-Base Voltage is 200V
Maximum Collector-Emitter Voltage is 140V
Maximum Emitter-Base Voltage is 6V
Maximum Collector Current is 10A
2SA1695
Polarity: PNP
Maximum Collector Power is 100 Watts
Maximum Collector-Base Voltage is 200V
Maximum Collector-Emitter Voltage is 140V
Maximum Emitter-Base Voltage is 6V
Maximum Collector Current is 10A
The diagram is here
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
TDA7293 TDA7294 PCB Layout Design:
This is the 200-watt audio amplifier circuit diagram. using 30-0-30 voltage. It’s a stereo amplifier circuit diagram. It’s the TDA7293 TDA7294 PCB Layout Design. Both ICs can be used in this circuit board. and per channel got 100 watts. It’s a bridge-mode circuit.
Transformer for the amplifier:
This is the transformer for the amplifier. It’s a toroidal transformer. Here we can make 2400 watts according to the core area. We know that we can calculate everything according to the core area. Our core is 10cm wide, and our height is 10cm. So, 10X10=100cm. 100cm is our circle area. area X area = watts. 100X100=10,000 watts. We know that watts/voltage=amperes. 10,000/220=45.45. 45amperes can make.
The transformer takes watts and outputs the same watts. Like we use 20-gauge wire in the primary. It makes 11 amperes. The AC voltage is 220. so, 220X11= 2420. 2420 watts. then output will be a maximum of 2420 watts. We can’t take more than 2420 watts. secondary voltage can be the extent, but the ampere should be low. Amperes X Voltage=Watts. If we need amperes, then the voltage will be lower. or a voltage higher than amperes lower.
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