Electronics Help Care electronics circuit diagram
Amplifier circuit using STK403- 450:
This is the amplifier circuit using STK403-450. This circuit is for the STK403-000 series. These 3 ICs can be used in this diagram. STK403-430, STK403-440 and STK403-450. STK403- 430 can make 6X20 watts using 30-0-30 voltage. STK403- 440 can make 6X30 watts using 35-0-35 voltage. STK403-450 can make 6X40 watts using 40-0-40 voltage.
The ICs
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 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.
Audio amplifier circuit using TDA7294:
This is an audio amplifier circuit using TDA7294 and 2SC5200, 2SA1943. This diagram can make 200 watts. We can use 15-0-15 voltage to 30-0-30 voltage and 4 amperes. It’s a mono diagram. A dual board is needed for stereo.
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Transistor circuit for an amplifier
Build a Transformer or construct the transformer. Home Theater Circuit Diagram 5.1
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