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Showing posts with label Audio circuit. Show all posts
Showing posts with label Audio circuit. Show all posts

10W Audio Amplifier Circuit by TDA2030

The amplifier circuit by ic TDA2030 described here is an powerful audio amplifier with output power of 10W. TDA2030 is a monolithic IC, used as a low frequency class AB Amplifier. It has high output current and very low distortion. This 10W audio amplifier using TDA2030 is good for home/ small room.

Circuit Diagram of '10W amplifier circuit using IC TDA2030' with power supply.


Fig-1: Circuit Diagram of 10W audio amplifier

5 LED VU meter circuit diagram using KA2284

This is a simple circuit diagram of 5-LED audio VU meter using IC KA2284/KA2285. The KA2284, KA2285 are monolithic integrated circuit. It is a logarithmic display driver IC. And it is Bar type display driver using 5-Dot LED. The KA2284/KA2285 has a wide range supply voltage capacity of 3.5V-16V, but we recommend to use about a 12VDC power supply.

Circuit Diagram:


Fig: 5-LED Dot/Bar (VU meter) circuit diagram

LA4440 Amplifier Circuit

LA4440 is a dual channel audio amplifier IC. It can be used in two modes; one is Stereo amplifier and another Bridge amplifier mode. The LA4440 is a monolithic linear IC from Sanyo. Here I give the both circuit mode of amplifier using IC LA4440.

Features of IC LA4440

  • It has 46dB of ripple rejection
  • Low distortion
  • Good channel separation
  • Thermal protector
  • Overvoltage protector
  • Surge voltage protector

LA4440 Stereo Amplifier Circuit

When the IC LA4440 is Stereo mode in the circuit, its output power is 6w+6w. In stereo mode use two pieces speaker of 2Ωto8Ω.
In the stereo amplifier configuration given below, C11 and C12 are output capacitor. But i ignore them from the circuit of bridge amplifier.

Fig-1: LA4440 Stereo Amplifier Circuit Diagram

Simple Circuit Diagram for Amplifier by TDA7052

This is a very small and simple Circuit Diagram for Amplifier of 1W mono audio output. The amplifier is based on a single IC TDA7052. It is in 8-pin DIL (Dual-In-Line) package. The IC TDA7052 is specially designed for battery-operated audio circuit for amplifier like tape recorders, radios etc.

Circuit Diagram of Simple 1W Audio Amplifier:

Fig: Simple Circuit Diagram for Amplifier
The power supply for this amplifier is 3V to 12V, but we recommend to use 6V power supply. If you want to going with battery, no problem the amplifier can also operate by even 3V Battery cell . The IC TDA7052 no needed any Heat Sink. In the circuit R2 is a Variable Resistor, used as volume controller. Capacitor C1&C2 used to filtering the supply voltage. If battery is used instead of power supply then it(C1&C2) isn’t needed anymore in the circuit. Use an 8Ω speaker at the output to hearing the mono amplification of audio.

LED Sound level display circuit by using IC LM3915

This circuit is about audio sound level LED display, indicator, monitor or you can say it “Audio VU (Volume Unite) Meter”.
This is a simple audio sound level LED display circuit diagram. The circuit is completely  based on  a single ic LM3915 from National Semiconductor. The LM3915 is a monolithic integrated circuit. It displays the audio sound level in terms of 10 LEDs and providing a logarithmic 3 dB/step analog display.

Audio sound level display circuit diagram


Fig: Circuit diagram of sound level display using ic LM3915
The audio sound level LED display circuit can operate from a single supply 3V to 25V. But I  suggest to use 9-12V. LED brightness can be controlled with a single pot( variable resistor) as shown 10K ohm in the circuit. Connect the audio input signal in Pin-5 of LM3915 from output of a audio device like output of audio amplifier or any other source.
The Pin-9 of LM3915 is to select dot or bar mode display. To make the circuit moving dot display instead of a bar graph display disconnect the Pin-9 from +V.

Bass and Treble Controller- Audio Equalizer Circuit

An audio equalizer circuit is used to adjust the frequency response of an audio signal. This is a simple equalizer circuit  for controlling the bass and treble (tone) of an audio amplifier. For use this equalizer circuit in amplifier, equalizer's output should be given in the input of amplifier. So that the main input  audio signal’s bass and treble could be controllable before the amplify section.

Circuit Diagram of Bass & Treble Controller- Audio Equalizer:


Fig: Audio equalizer circuit for Bass, Treble control
As shown here the bass and treble controller circuit  has two variable resistor(VR1 & VR2) to control  the bass and treble. VR1 for Bass Control and VR2 for Treble Control.
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