Simple Stereo VU Meter

I like to peer gentles transfer to music. This venture will point out the volume level of the audio going to your audio system with the help of lighting fixtures up LEDS. The LEDS will additionally be any shade so combine them up and in point of fact make it seem to be good. The input of the circuit is connected to the speaker output of your audio amplifier. You wish to construct two equivalent units to point out each proper and left channels. The input signal degree is adjusted by using the 10k ohm VR. If you wish to make an extraordinarily huge scale edition of this unit and dangle it on your wall there's an not obligatory output transistor that can power many LEDS immediately. The unit I built drove three LEDS for every output. The sequence of the LEDS lighting are as follows Pin 1, 18, 17, sixteen, 15, 14, 13, 12, eleven, 10.

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TDA2004 stereo bridge audio amplifier

Most of the lovers, especially in audio electronics, it will never escape from this one component of the IC TDA2004. Because these components are very easy to get and the price is also quite cheap. Amplfiier audio series was also quite easy to make because the circuit is not too complicated, and one ic also already has 2 outputs and inputs.

Not only that, the audio is processed from the IC is also well qualified, many power power branded car, using it as an amplifier ic. Nothing mistake this ic tried to make an audio amplifier. For the circuit scheme can be seen below.

with this amplifier circuit you can easily enhance your audio levels, from your stereo walkman, Ipod, tuner, MP3 player or MP4, the portable receiver, laptops or PCs

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Sony Car Stereo

The Sony Corporation, based in Tokyo is a leading manufacturer of audio, video, communications, and information technology products for the consumer and professional markets. Their music, motion picture, television, computer entertainment, and online businesses also make Sony one of the most comprehensive entertainment companies in the world. 

So it is not surprising to learn that Sony car stereos are also well renowned in the automotive audio market. In 2005, Sony car stereos launched their latest carrier car audio product, the Sony car stereo Xplod series which has an amazing lineup of head units, speakers, amplifiers, subwoofers, changers and accessories. It is impressive both in performance and aesthetic value. 

Sony car stereo Xplod Series

A good head unit from the Sony car stereo Xplod Series is the CDX – M9900 CD Receiver/Changer Controller/MP3 Player which boasts these features:   

- 32,000-color TFT display

- Video Input for External Source Playback

- CD/CD-R/CD-RW/MP3 playback

- 4-Volt F/R/Sub Preouts w/HPF & LPF

- 52W x 4 High Power

- CEA-2006 Power Compliant

- CD/MD Control, CD Text

- XM Ready

- BBE MP, DSO, EQ7

- Auxiliary Input

- 1-bit D/A Converter

- Drive-S with 120dB S/N Ratio

- SSIR-EXA tuner, 18FM & 12AM presets

- Red key illumination

- Supplied wireless card remote (RM-X145A)

- Optional wireless rotary remote (RM-X6S)

- Optional wired rotary remote (RM-X4S)   

This Sony car stereo goes best installed with matching items from the Xplod series such as: 

Sony car stereo XS – V6941H 6 x 9” 4 - Way Speakers: 

- 6 x 9" HOP Woofer Cone

- Stroke Stabilizer Surround

- 2-5/8" Cone Mid

- 1" Balanced Dome PEI Tweeter, Super Tweeter

- 400W Peak Power (100W RMS)

- Flexible Mounting Options 

Sony car stereo XM-2100GTX 2/1 Channel Amplifier:

- 600W Max Power

- 100W x 2 RMS into 4 ohms, 20Hz-20kHz @ 0.04% THD

- 250W x 1 RMS into 4 ohms, 20Hz-20kHz @ 0.1% THD

- CEA-2006 Power Compliant

- Variable 50 - 300 Hz low pass filter

- 40 Hz EQ boost

- MOSFET power supply

- RCA & speaker level inputs

Sony car stereo XS-L102P5 10” Subwoofer: 

- 10" Polypropylene Cone

- 1200W Peak Power (330W RMS)

- Unique cone design offers superior rigidity

- Gold-plated Binding Posts

- Small sealed/bandpass enclosure optimized

- 4-Ohm Voice Coil

- 2005 Subwoofer Parameters

Like other modern car audio manufacturers, the Sony car stereo also offers video capable units for playing VCDs, DVDs. A good item from the Sony car stereo Dream System Series is the MV - 900SDS Mobile DVD Dream System. 

- 9" wide screen TFT display with swivel function

- DVD/CD-R/RW/VCD/MP3 Playback

- Built-in wired FM modulator

- Reversible display image

- Slot-load DVD Mechanism

- Memory Stick® media for playback of JPEG, MPEG, MP3

- Built-in Stereo Speakers

- A/V Input

- A/V Output

- Optical Digital Output (Dolby Digital®, dts®)

- IR transmitter for wireless headphones

- 2 sets of wireless headphones included

- Wireless card remote included

This unit is encased in a grey metallic finish and is ideally attached on the ceiling of the vehicle. 

It is also an amazing fact that a lot of enthusiasts also incorporate the PlayStation into their Sony car stereos, which is probably one of the reasons why the Sony car stereo system has earned quite a following.     

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Stereo Headphone Amplifier

Stereo Headphone Amplifier circuit uses DC voltage source 9Volt. As the name suggests this headphone amplifier circuit has inpur stereo and output to power about 50mW at 32 Ohm load. The series of "Stereo Headphone Amplifier" It uses mini-amplifier IC NE5534. Because of this NE5534 IC didalamanya there are 2 pieces mini amplifier then simply use 1 piece of IC NE5534 to Stereo Amplifier aHeadphone this. Stereo Headphone Amplifier series has this capability and low distortion, low noise. Stereo Headphone Amplifier circuit has a strengthening of 3.5 with 3.6 Vpp at 32 Ohm load.

Component Stereo Headphone Amplifier
P1 = 22K
R1 = 18K
R2 = 68K
R3 = 68K
R4 = 68K
R5 = 18K
R6 = 68K
C1 = 4.7uF/25v
C2 = 4.7uF/25v
C3 = 22pF
C4 = 220uF/25v
C5 = 220uF/25v
C6 = 4.7uF/25v
C7 = 22pF
C8 = 220uF/25v
J1 = 3.5mm Stereo Jack
B1 = 9V Alkaline Battery
IC1 = NE5532 or NE5534
SW1 = SPST Toggle Switch

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Stereo Amplifier with Voltage Regulators

A simple stereo audio amplifier is built around two 7905 negative-voltage regulators (IC1 and IC2) and a few discrete components. The circuit will also work with other 79XX regulators if appropriate power supply is used. Regulator IC 7905 works as an amplifier for the voltages applied to common pin2 (Ground or GND). Also check the LM317 audio amplifier, another interesting circuit.

The minimal voltage drop over the standard 7905 is around 2V and it depends on the output current. Feedback resistors in the IC set the gain of the channel internally. The amplifier is a class-A audio amplifier. The minimal applicable value of R3 for the regulator 7905 is 8.2 to 10 ohms per 5W.

1W Stereo Amplifier with Voltage Regulators Circuit Diagram

If the required output current for LS1 is below 100 mA, the value of resistor R3 can be 33 to 51 ohms per watt. The circuit works with any load resistance (R3 in parallel with LS1 as the load) under the condition that the regulator is not overloaded with current and power dissipation. However, it is preferable to use a loudspeaker with a high resistance (8 ohms, 16 ohms or more). The amplifier works well with low-impedance headphones having a resistance of 24 to 32 ohms. The voltage difference between the ground pin of 7905 and the output pin is fixed internally.

S2 is the on/off switch. Switch S1 is for mono/stereo selection. When switch S1 is closed, the amplifier works as a two-way mono amplifier. If S1 is open, the amplifier works as a stereo amplifier. If no input signal is applied, the DC voltage on the output of the regulator 7905 should be around –5V, which depends to some extent on the value of VR1. The maximum output current of 7905 can be up to 1A and the maximum power dissipation is up to 15W. Mount the regulator IC 7905 on a heat-sink with thermal resistance below 15°C/W.

Source:  http://www.ecircuitslab.com/2012/08/a-simple-stereo-amplifier-with-voltage.html

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