Electronics Help Care Amplifier circuit diagram
Pioneer amplifier driver circuit for a transistor:
This is a Pioneer amplifier driver circuit for a transistor amplifier. This circuit runs with 25-0-25 voltage to 70-0-70 voltage. And we can use a minimum of 2 transistors to 20 transistors. This circuit needs to be dual voltage, positive and negative, and ground voltage. PNP and NPN transistors are used here. like 2sc5200 and 2sa1943.
Amplifier circuit diagram using driver board:
This is an amplifier circuit diagram using a driver board. It’s a mono circuit using PNP and NPN transistors. It can make 600 watts of output using 60-0-60 voltage and 10 amperes. 60X10=600 watts. Here, we use 8 transistors. We can also use an extra transistor if we want. A maximum of 20 transistors can be used in this circuit.
This is the Speaker protection circuit diagram. It can protect our Speaker from burns. 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.
The LM3915 is a mono-integrated circuit that has analog voltage levels. It drives ten LEDs and LCDs. providing a logarithmic 3 dB/step analog display. 1 pin changes the display from a bar graph to a moving one. LED current drive is regulated. It’s needed for current limiting resistors. This circuit can operate from a single supply minimum of 3 volts or a maximum of 25 volts. The input buffer accepts signals down to the ground and up to within 1.5 volts of the positive supply it needs no protection against inputs of ±35 volts. The audio input stupid drives 10 separate comparators referenced. Accuracy’s better than 1 dB. The LM3915’s 3 dB/step display is suited for signals. such as audio level, power, and light intensity. Audio includes average or peak level indicators. Replacing the usual meters with an LED bar graph results in faster responding.
The LM3915 is extremely easy to use. A 1.2V full-scale meter demands only one resistor in addition to
the last, which means ten LEDs. LED brightness is easy to control
with a single pot.
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