ACD-ROM drive
can be used as a stand-alone unit for playing digi- tal 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 500 mW. 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. 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. While there may be minor differences amongst the available
CD-ROM drives’ external controls, a typical drive’s controls are shown in
the figure on top. 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.
ACD-ROM drive
can be used as a stand-alone unit for playing digi- tal 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 500 mW. 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. 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. While there may be minor differences amongst the available
CD-ROM drives’ external controls, a typical drive’s controls are shown in
the figure on top. 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.