Showing posts with label stereo. Show all posts
Showing posts with label stereo. Show all posts
Monday, May 13, 2013
Stereo line driver circuit
This is the circuit diagram of a low cost stereo line driver is given here. The circuit consists of only two transistors and few passive components. Each BC 109C transistor is wired as an emitter follower for driving each channel. The voltage gain of the emitter follower is unity, but it has a high current gain and low output impedance, ideal for driving long cables. The output impedance is around 16 Ohms at 1KHz.Since voltage gain is unity power amplifiers must be used at the listening end in order to drive loud speakers.
Notes.
* Assemble the circuit on a general purpose PCB.
* The circuit can be powered from a 12V battery or 12V DC power supply.
* The inputs and outputs must be connected with respect to ground as shown in circuit.
* A power amplifier is needed at the listening end because the emitter follower has only unity voltage gain.
* The line driver circuit must be place close to the audio source.
Continue reading...
Notes.
* Assemble the circuit on a general purpose PCB.
* The circuit can be powered from a 12V battery or 12V DC power supply.
* The inputs and outputs must be connected with respect to ground as shown in circuit.
* A power amplifier is needed at the listening end because the emitter follower has only unity voltage gain.
* The line driver circuit must be place close to the audio source.
Saturday, April 6, 2013
Stereo TDA2822 audio power amplifier circuit
In this series I use IC tda2822M as the main amplifier, but if you want to use in addition to IC TDA2822M you can use ic I mentioned this is KA2209, NJM2073, U2822B, U2823B. Output is issued no more than 4W, which had low output. Supply voltage from 3 volts to 16 volts.
Below its schematics of TDA2822 stereo audio power amplifier
R1 = 4.7R
R2 = 4.7R
C1 = 1uF
C2 = 100uF
C3 = 100uF
C4 = 0.1uF
C5 = 470uF
C6 = 1uF
C7 = 100uF
C8 = 0.1uF
C7 = 100uF
C8 = 0.1uF
C9 = 470uF
ICs = KA2209 , NJM2073 , TDA2822 , U2822B , U2823B
Wednesday, April 3, 2013
The Alpine Car Stereo
We all know that brand names matter when purchasing car audio hardware. There are brands that are surely more reputable than others. When you are at the store and they offer choice after choice after choice, suddenly you feel overwhelmed on what really to buy. But you can be assured of one thing, if they offer you an Alpine car stereo you can’t go wrong with it.
Alpine car stereo and electronics, founded in 1978, is a world leader in the industry of high performance mobile electronics. They specialize in mobile multimedia, an integrated system approach incorporating digital entertainment, security and navigation products for the mobile entertainment.Alpine car stereos are a new breed of units which feature the convergence of high performance audio, video, navigation and telematics in the form of Mobile Multimedia. Navigation systems act as the resource center of the Alpine car stereo Mobile Multimedia lineup. Intelligent Transportation Systems (ITS), DVD players, Dolby Digital systems, satellite digital audio radio, mobile data linking and communication through telematics devices will be fused with navigation systems to create a platform of products. Mobile Multimedia integrates Alpines innovative audio, video, security and navigation products, as well as its new GUI for Drivers, human interface and information communications technology.
To grasp what the Alpine car stereo Mobile Multimedia is, take a look at the IVA-D901 Alpine car stereo Mobile Multimedia Station/CD/DVD Receiver/Ai-NET Controller.The IVA-D901 has 400% more pixels than a conventional in-vehicle display, meaning that it has 1.15 million pixel elements. It has 50W x 4 built-in power and 3 PreOuts (4 volt), SAT Radio ready, a Hard Disc Drive (HDD), and Alpine car stereo Navigation. Key features include:
- 7" Fully Motorized Wide Screen Monitor
- 18W x 4 MOSFET Amplifier
- Built-in Dolby Digital/DTS Decoder
- Bass Engine® Plus
- Subwoofer Level Control
- Bass Center Frequency Control
- Bass Band Width Adjustment
- Treble Center Frequency Control
- Subwoofer Phase Selector
- Bass Type Control
- 4-Ch Digital Time Correction
- 3 Position 12 dB/Oct Crossover
- MediaXpander™
- SAT Radio Ready
- MP3 Text Information Display
- Quick Search Function
- CD/CD-R Playback
- CD Text, Text Display, Text Scroll
- M DAC
- MaxTune SQ Tuner
- 3 Auxilliary A/V Inputs with Remote Control Input
- Dedicated Navigation Input
- Dedicated Camera Input
- 2 Auxilliary Monitor A/V Outputs
- Navigation Audio Mix
- 3 PreOuts (4 volt)
- MM Driver (Hard Disc Drive) Ready
- MobileHub Ready
- Ai-NET Control Center DVD/CD/MP3 Changer Controller
- "Digital Art" Spectrum Analyzer Display
- RUE-4190 Universal Wireless Remote Control Included
If these all seems too much for you, Alpine car stereos also have more conventional head units to offer. The CDA-9835 Alpine car stereo In-Dash CD Player/Ai-Changer Controller lets you fully customize both illumination and sound, with a range of 512 colors and super-versatile Bass Engine functions like digital time correction and parametric EQ. You can download audio parameter settings and connect and control as many as eight amps. The BioLite display, Menu key and rotary knob make operation extremely easy.
Like most Alpine car stereo units, it is also SAT Radio Ready, giving you a much greater choice of listening options than ordinary local AM/FM radio. You can select from among a wide range of music genres, news, sports, and talk programs with digital quality anywhere.
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