20W Car Audio Amplifier with LM1875

This is just addition 20W audio amplifier circuit , but this time based on the LM1875 audio amplifier IC from National Semiconductors. With a 25V bifold ability accumulation LM1875 can bear 20W of audio ability into a 4 ohm speaker. The LM1875 requires actual beneath external components and has actual low distortion.The IC is aswell...

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Magnetic Proximity Switch Circuit

Here is the circuit diagram of a magnetic proximity switch that finds a lot of applications in abounding fields.The ambit is based on a alluring reed switch(S1) as the adjacency sensor. A monostable multivibrator based on NE555 (IC1) and a toggle cast bomb based on CD4013 (IC2) does the blow of the circuit. When a allurement is accomplished...

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Ramp Generator With 555 Timer IC

We apperceive that if a capacitor is answerable from a voltage antecedent through a resistor, an exponential waveform is produced while charging of a capaci­tor from a connected accepted antecedent produces a ramp. This is the abstraction abaft the circuit. The circuit of a access architect application timer 555 is apparent in figure....

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Static 0 to 9 display With 7490 & 7446 IC

The Ciruit apparent here is of a simple 0 to 9 display that can be active in a lot of applications. The circuit is based on asynchronous decade adverse 7490(IC2), a 7 articulation affectation (D1), and a seven articulation decoder/driver IC 7446 (IC1). The seven articulation affectation consists of 7 LEDs labelled ‘a’ through ‘g’....

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Metal Detector based on IC CS209A

This is an easy metal detector circuit based on IC CS209A from the Cherry Semiconductors. A 100uH coil is employed to sense the presence of metal. The IC CS209A has a built in oscillator circuit and also the coil L1 forms a part of its external LC circuit that determines the frequency of oscillation. The inductance of the coil change in...

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100W Audio Amplifier with TDA7294

TDA7294 is an integrated, monolithic, Class AB audio amplifier designed precisely for Hi-Fi applications. The IC has a DMOS output stage and can deliver 100W RMS into an 8Ohm speaker at +/-38V dual supply.In the circuit TDA7294 is configured to provide 100W output power into an 8Ohm loudspeaker at +/- 38V supply. C8 is the input coupling...

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MC3479 Stepper Motor Driver

The circuit diagram is given here is a motor controller driver using the Motorola MC3479. The MC3479 is designed specifically for driving a stepper motor phase 2 in bipolar mode and is available in standard DIP and surface mount IC packages.The is compatible with TTL and CMOS and has selectable HI / LOW output impedance .The output can...

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