Car Stereo Amplifier Circuit

admin February 14, 2011 11 Comments
Car Stereo Amplifier Circuit Given below is the circuit of a car stereo amplifier that can be used in cars or other vehicles. We have used TDA1553, which is a Class-B audio amplifier. Description : Here is the circuit of a car stereo amplifier based on TDA1553. TDA1553 is a monolithic Class-B audio amplifier which contains 2 x 22 watt amplifiers in bridge tied load configuration. The amplifier operates from 12V DC and is developed intentionaly for car audio...
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Active crossover circuit

admin February 9, 2011 4 Comments
Active Crossover Circuit Given below is an Active crossover circuit suitable for HiFi audio systems using LM833, the dual operational amplifier. Description: Crossover circuits are of two types, active and passive. Passive crossover circuit uses passive components only and they are very simple, but they waste a considerable amount of energy and also induce distortion. Active crossovers does not have the above said draw backs and they are a better option for HiFi audio systems. Active crossovers split the...
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Bridge Amplifier using TDA 4935

admin June 1, 2015 1 Comment
Bridge Amplifier The circuit given below is a bridge audio amplifier circuit using IC  TDA4935. Description : TDA4935 is 2x15W high quality audio amplifier IC from Siemens. The IC can be used in stereo mode or bridge mode. In stereo mode it can deliver 15W per channel and in bridge mode it can deliver 30W into a 8 ohm load at 30V supply. TDA4935 requires very few external components and has a wide power supply voltage range. The IC...
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HiFi headphone amplifier circuit

admin January 7, 2011 4 Comments
Description. LM4880 is HiFi dual audio amplifier IC from National Semiconductors. This IC is specifically designed to produce high quality audio output with a minimum number of external components.LM4880 is capable of delivering 250mW per channel into an 8 ohm load. The IC has 0.1% THD and has a supply voltage range of 2.7 to 5V DC. In the circuit shown below, resistors R1 and R2 are feedback resistors.C4 and C5 are input DC decoupling capacitors. Capacitor C3 provides...
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Stereo sound level indicator

admin February 9, 2011 4 Comments
Stereo sound level meter / Stereo VU meter Description. The circuit shown here is of a stereo sound level indicator/VU meter  using the IC TA7666P from Toshiba. The TA7666P consists of 2 inverting amplifiers, ten comparators and a reference voltage generator. The turn on levels for TA7666P are 5dB, 5dB, 3dB, 3dB and has a supply voltage range between 6 to 12V DC. The IC has low quiescent current and has variable voltage gain. In the circuit R11 and...
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3 channel audio splitter

admin January 5, 2011 5 Comments
Description. Here is the circuit diagram of a simple 3 channel audio splitter based on the IC NE5532. NE5532 is a dual internally compensated low noise opamp from Fairchild semiconductors. It has a high small signal and power bandwidth, making it well suitable for high quality audio applications. Here the IC1 is wired as a non inverting amplifier with a gain 3.The audio signal to be splited is applied to the non inverting pin of IC1 through the POTs...
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Low pass filter for subwoofer

admin January 4, 2011 74 Comments
Description. Many low pass filter circuits for subwoofer are given here and this is just another one. The circuit given here is based on the opamp TL062 from ST Micro electronics. TL062 is a dual high input impedance J-FET opamp which has very low power consumption and high slew rate. The opamp has excellent audio characteristics and is very suitable for this circuit. Out of the two opamps inside TLC062, first one is wired as the mixer cum pre...
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20W audio amplifier using LM1875

admin August 14, 2010 8 Comments
Description. This is just another 20W audio amplifier circuit , but this time based on the LM1875 audio amplifier IC from National Semiconductors. With a 25V dual power supply LM1875 can deliver 20W of audio power into a 4 ohm speaker. The LM1875 requires very less external components and has very low distortion. The IC is also packed with a lot good features like fast slew rate, wide supply voltage range, high output current, high output voltage swing, thermal...
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20W audio amplifier using TDA7240

admin August 12, 2010 18 Comments
Description The audio amplifier shown here is based on the TDA7240 IC from ST Microelectronics. The TDA 7240 is an integrated audio amplifier IC that can deliver 20 watts of audio output power into a 4ohm load. The IC has minimum external parts count and is available in the 7 pin compact Heptawatt package. The IC also has a lot of good features like loud speaker protection, short circuit protection, low noise, low distortion etc. The circuit can be...
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Stereo preamplifier with tone control

admin August 11, 2010 30 Comments
Description. Here is the circuit diagram of an excellent stereo preamplifier with tone control using the IC TDA1524 from Phillips. The IC requires very few external components, has very low noise and has a wide power supply voltage range.  POTs R1 to R4 can be used for controlling the volume, balance, bass and treble respectively. LED is D1 is a power ON indicator and R1o is its current limiting resistor. Circuit diagram. Notes. Assemble the circuit on a good...
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