Saturday, March 30, 2013

Axletrailer Axles Running Gear Componentstrailer Plug Wiring

Trailer Wiring Diagram on Standard Seven Way Plug Wiring Diagram   Page 2   Ford Truck
Standard Seven Way Plug Wiring Diagram Page 2 Ford Truck.


Trailer Wiring Diagram on Heavy Metal Photos  Trailer Light Diagram
Heavy Metal Photos Trailer Light Diagram.


Trailer Wiring Diagram on Wiring Diagram For Bumper Pull Dump Trailers And Roll Off Dump
Wiring Diagram For Bumper Pull Dump Trailers And Roll Off Dump.


Trailer Wiring Diagram on Trailer Pulling Information
Trailer Pulling Information.


Trailer Wiring Diagram on Axle   Trailer Axles And Running Gear Components   Trailer Plug Wiring
Axle Trailer Axles And Running Gear Components Trailer Plug Wiring.


Trailer Wiring Diagram on Generic Diagram Of Trailer Wiring
Generic Diagram Of Trailer Wiring.


Trailer Wiring Diagram on Trailer Wiring Connector Diagrams For 6   7 Conductor Plugs
Trailer Wiring Connector Diagrams For 6 7 Conductor Plugs.


Trailer Wiring Diagram on Wiring Diagram For Trailers   Caravans
Wiring Diagram For Trailers Caravans.


Trailer Wiring Diagram on Trailer Circuit Wiring
Trailer Circuit Wiring.


Trailer Wiring Diagram on Pin  S  Type Caravan Wiring   Uk Trailer Parts
Pin S Type Caravan Wiring Uk Trailer Parts.


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Wednesday, March 27, 2013

CD ROM Drive as Digital audio CD Player

A CD-ROM drive can be used as a stand-alone unit for playing digital audio CDs without interfacing with a computer. The stereo output of CD player available at the audio jack can be amplified using audio input facility which is normally available on a tape-deck/tape-recorder or a stereo amplifier. Audio socket on front/rear of the CD-ROM drive is capable of driving headphones or speakers of less than 500mW. Proper stereo jacks for interconnection between CD-ROM drive and tape deck are available from computer/tape recorder spares vendors. The principle of operation is illustrated here with the help of block diagram.

CD-Rom Drive as Digital-Audio CD Player

The 4-pin power supply socket available at the rear of a CD-ROM player is meant for +5V, ground (two middle pins) and +12V inputs. The power supply can be easily derived using a conventional power supply circuit as shown in the figure. If you have an external CD-ROM drive, it can be simply plugged into the mains since it has self-contained power supply circuit inside.

OM Drive as Digital

While there may be minor differences amongst the available CD-ROM drives’ external controls, a typical drive’s controls are shown in the figure here. Please ensure that a proper power supply connector available from computer spare parts vendor is used for connection to CD-ROM drive. To identify +5V and +12V pins on the drive connector, please note that in the computer +12V is routed using a yellow wire and for +5V a red wire is used, while for ground black wires are used with the supply connector. Once the power supply has been connected correctly, you will notice that LED indicator on the drive starts flashing. Now the digital audio CD can be loaded after pushing the eject button. A second push of the same button causes retraction of CD carriage into the drive. One can change the track (song) on the CD using play switch on the CD-ROM drive.

Source :ELECTRONICS PROJECTS Vol. 20

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Thursday, March 21, 2013

Balanced Output Board For The Stereo DAC

balanced-output-board-for-the-stereo-dac-cicuitw

This add-on board is designed to provide a pair of balanced audio outputs for the High-Quality Stereo DAC (Digital to Analog Converter). Two 3-pin male XLR connectors are used for the new outputs and they can either replace or augment the existing unbalanced outputs without affecting their performance. Balanced audio is used in recording studios and on stage because of its improved noise immunity.

Picture of the project:

  balanced-output-board-for-the-stereo-dac-cicuit-schematicw  

This is due to the fact that the signal is sent differentially (ie, as two signals 180° out of phase) and then converted to a single-ended voltage signal at the far end. If any noise is picked up in the cable, it affects the two out-of-phase signals equally so that when the signals are subsequently subtracted, most of the noise is eliminated.

Parts layout:

parts-layoutbalanced-output-board-for-the-stereo-dacw

In addition, the DAC’s performance at the balanced outputs generally exceeds that of the unbalanced outputs, although only by a small margin. The signal-to-noise ratio, frequency response and channel separation are all better, although we measured a tiny bit more distortion from the balanced outputs. However, both levels are so low as to be almost negligible.

Circuit diagram:

balanced-output-board-for-the-stereo-dac-cicuit-diagramw

Comparison chart:

chart tabl

 

Source : www.siliconchip.com

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