100 Watt sub woofer amplifier.

john January 23, 2018 815 Comments
Description. This is the circuit diagram of a fully transistorized sub woofer amplifier that can produce an output of 100W.There are seven transistors including four in the output stage. The transistors Q1 and Q2 form the preamplifier stage. Transistors...
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Audio clipping indicator circuit

admin April 7, 2010 No Comments
Description. This circuit can be used to identify whether there is a clipping in a particular wave form. Clipping is a phenomenon in which the amplitude of a particular waveform drops before it reaches the expected limit. This circuit...
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Signal tracer circuit.

admin April 7, 2010 10 Comments
Description. A high gain amplifier circuit that can be operated from a battery pack of 6 or 9 volt battery pack is shown here.The IC1 uA 741 is wired as a high gain non-inverting amplifier and its output is...
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Guitar pre-amplifier using uA 741.

admin April 7, 2010 5 Comments
Description. A preamplifier circuit suitable for high impedance type electric guitar pickups is given here.The circuit is based on a uA 741 op-amp (IC1).The IC1 is wired as a non-inverting amplifier.The POT R1 can be used as a volume...
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Magnetic pickup pre-amplifier circuit.

admin April 7, 2010 3 Comments
Description. A preamplifier for magnetic pickups of record players is shown here.The uA 741 is used as an AC coupled non-inverting amplifier operating on a single supply.The amplifier gain is decided by the feedback components in which C2 controls...
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Crystal pickup pre-amplifier circuit

admin April 7, 2010 No Comments
Description. A preamplifier operating on a single supply and suitable for use with high impedance type crystal pickups is shown here.The circuit is basically a non-inverting AC amplifier in which the gain is dependent on the feedback resistor R4.The...
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Power megaphone circuit

admin April 7, 2010 8 Comments
Description. Just about any power transistor can be used in  this megaphone.Its suitable for boats,playing fields etc.the transistors Q1  & Q2 are the HEP-230 type which are easily available in the market.The transistors are parallely connected to handle the...
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FM adaptor circuit for car stereo

jacky April 7, 2010 7 Comments
Description. With this compact FM adaptor circuit plugged into the audio out of your cassete player or i Pod out put,you can listen your favorite music on your car stereo.This circuit is very useful if your car stereo doesnot...
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Head phone amplifier circuit

admin April 7, 2010 2 Comments
Description. Here is a simple head phone amplifier circuit that can be used to drive your head phone if your music player doesn’t have  enough power to drive your head phones.The circuit is straight forward and uses only three...
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Sound pressure meter

admin April 7, 2010 3 Comments
Description. Here is a simple circuit that can be used to check the sound levels.The sound pressure meter is vey useful in setting up home theater systems , if you need to test the sound pressure of each channels...
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