Showing posts with label audio. Show all posts
Showing posts with label audio. Show all posts
Wednesday, June 12, 2013
10Watt Audio Amplifier with Bass boost circuit
Circuit diagram
parts list
P1_________________22K Log.Potentiometer (Dual-gang for stereo)
P2________________100K Log.Potentiometer (Dual-gang for stereo)
R1________________820R 1/4W Resistor
R2,R4,R8____________4K7 1/4W Resistors
R3________________500R 1/2W Trimmer Cermet
R5_________________82K 1/4W Resistor
R6,R7______________47K 1/4W Resistors
R9_________________10R 1/2W Resistor
R10__________________R22 4W Resistor (wirewound)
C1,C8_____________470nF 63V Polyester Capacitor
C2,C5_____________100µF 25V Electrolytic Capacitors
C3,C4_____________470µF 25V Electrolytic Capacitors
C6_________________47pF 63V Ceramic or Polystyrene Capacitor
C7_________________10nF 63V Polyester Capacitor
C9________________100nF 63V Polyester Capacitor
D1______________1N4148 75V 150mA Diode
IC1_____________NE5532 Low noise Dual Op-amp
Q1_______________BC547B 45V 100mA NPN Transistor
Q2_______________BC557B 45V 100mA PNP Transistor
Q3_______________TIP42A 60V 6A PNP Transistor
Q4_______________TIP41A 60V 6A NPN Transistor
J1__________________RCA audio input socket
Power supply circuit
Circuit diagram
Parts R11_________________1K5 1/4W Resistor
C10,C11__________4700µF 25V Electrolytic Capacitors
D2________________100V 4A Diode bridge
D3________________5mm. Red LED
T1________________220V Primary, 12 + 12V Secondary 24-30VA Mains transformer
PL1_______________Male Mains plug
SW1_______________SPST Mains switch .Electronics Circuit Application
Monday, April 8, 2013
Kenwood Car Stereo Car Audio
Kenwood Car Stereo Lets You Listen To The Future Of Car Audio. - This brand is a household name for every car audio enthusiast. Mention the name Kenwood car stereo and they will know what you’re talking about.
Kenwood car stereos have produced high quality consumer electronics, test equipment and communication equipment since 1946. Kenwood car stereos primarily specialize in the design, engineering and manufacture of wireless communication infrastructure but are also renowned in the production consumer mobile and home entertainment systems. Kenwood car stereos are also committed to creating the finest quality components with state of the art technologies that has earned them a huge following in the audio products scene.
At present, Kenwood car stereos have a very impressive product lineup that would make anyone drool over, whether he is an audio enthusiast or not. For the regular Joe who isn’t really into technical stuff, and is just looking for something nice to put into his ride, Kenwood car stereos offer sleek designs that will surely satisfy anyone’s craving for aesthetic. Tech-freaks and geeks will also be impressed with the specs a Kenwood car stereo has.
A lot of Kenwood car stereo units nowadays include popup LCD panels for watching VCD/DVD movies. The Kenwood KVT-717DVD 7.0” Wide, Fully Motorized In-dash Monitor DVD/WMA/MP3 Receiver is a good candidate for any situation.
• 7.0 inch Wide Color TFT Active Matrix Display
• Full-automatic Open/Close with slide and angle adjustments
• Interactive Touchscreen Control with OSD
• Audio Easy Control Mode while Playing Visual Source
• Selectable Wall Paper (6 Patterns)
• Installer/Backup Memory of Audio/Video Setup
• Maximum Output Power : 50W x 4 (MOSFET Power IC)
• 3 Preouts with 5V Pre-out Level
• 2 RCA AV Inputs / 1 RCA AV Output
• Video Input for Rear View Camera
• RGB Input for Navigation System
• System Q/ System Es+
• DVD Menu Direct Touch screen Control
• MPEG 1/2 Video files (.mpg) and JPEG files (.jpg) Playback
• Dual Zone Source & Volume Control
• DVD±R/RW Compatible
• External Media Control — iPod Ready
• Optional TV Tuner
For those who might not get what the hell all of these means, just imagine this: a really thin monitor panel that smoothly retracts and extends at the push of a remote, crystal clear movie and picture playback, all encased in a beautiful black matte finish polymer casing done with a space age design.
If all you want is a just a regular car stereo for playing CDs’, listening to mp3s or the radio, Kenwood car stereo have a lot to choose from. A good head unit would be the KDC-MP928 AAC/WMA/MP3/ CD Receiver with External Media Control.
• Auto-Slide Detachable Faceplate
• Rotary Encoder & Jog Control Knob for Easy Operation
• 4096 Color OEL Display
• Display Customize Function
• Maximum Output Power : 50W x 4 (MOSFET Power IC)
• ACDrive (Advanced Codec Drive)
• AAC/WMA/MP3 Playback
• G-Analyzer (Graphic Motion Analyzer)
• Built-in DSP : DTA/System Q(4band P-EQ)/Digital Es/SRS
WOW Digital Effect
• O.D.D. (Offset Dual Differential) D/A System for Sound Quality
• Installer/User/Backup Memory of Audio Setup
• SIRIUS Satellite Radio Ready
• HD Radio Ready
• External Media Control — iPod Ready
• Dual Zone Source & Volume Control
• AUX Input
• Gold Plated 3 Preouts with 5V Pre-output Level
The Kenwood car stereo auto slide detachable faceplate allows you to take the faceplate (one which has all the buttons) in order to prevent theft by taking away the functionality of the unit left in the car.
Tuesday, April 2, 2013
Car Radio Audio Amplifier using TDA2003
The TDA 2003 IC has improved performance with the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low number of external components, ease of assembly, space and cost saving, are maintained. The device provides a high output current capability (up to 3.5A) very low harmonic and cross-over distortion. Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground.
TDA2003 has DC Characteristic with VDC power supply min 8V and max 18V. If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin 5, in order to assure that the pulses at pin 5 will be held within the limits. In short circuit AC and DC conditions, The TDA 2003 can withstand a permanent short circuit on the output for a supply voltage up to 16V. When the radio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged. On the TDA 2003 protection diodes are included to avoid any damage.
The presence of a thermal limiting circuit offers the following advantages; an overload on the output (even if it is permanent), excessive ambient temperature can be easily withstood. The heat-sink can have a smaller factor compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature: all that happens is that Po (and there fore P total) and Id are reduced.
TDA2003 has DC Characteristic with VDC power supply min 8V and max 18V. If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin 5, in order to assure that the pulses at pin 5 will be held within the limits. In short circuit AC and DC conditions, The TDA 2003 can withstand a permanent short circuit on the output for a supply voltage up to 16V. When the radio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged. On the TDA 2003 protection diodes are included to avoid any damage.
The presence of a thermal limiting circuit offers the following advantages; an overload on the output (even if it is permanent), excessive ambient temperature can be easily withstood. The heat-sink can have a smaller factor compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature: all that happens is that Po (and there fore P total) and Id are reduced.
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