CD-Rom to RCA audio project

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*[[Micronik Infinitiv A1200 Tower Case Project|Micronik Infinitiv A1200 Tower Case Project
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*[[A1200 Upgrade Options|A1200 Upgrade Options]].  
*[[A1200 Upgrade Options|A1200 Upgrade Options]].  
*[[Amiga Reference Books|Amiga Reference Books]].
*[[Amiga Reference Books|Amiga Reference Books]].
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==Reference==
==Reference==

Revision as of 08:55, 28 November 2008

CD-Rom audio to RCA (Phono) output

CD-Rom to RCA Audio
Created 2008
Creator Tiago
Based On Custom hardware
Kickstart n/a
Operating System n/a
CPU n/a
Memory n/a

Contents

Hardware Spec/Parts Needed

  • RCA audio cable with left and right phono connectors
  • CD-Rom audio cable
  • PCI style metal backplate
  • Hot Glue Gun

Project details

This hardware project forms part of the larger Micronik Infinitiv A1200 Tower Case Project.

This small project is designed to create a connector to route the audio from an internal CD-Rom drive out of the computer's case to a pair of RCA Phono audio connectors mounted on a PCI style backplate; making it easy to then connect the audio to an external set of speakers or amplifier.


While i was doing my A1200 Tower Project, after getting the CD-ROM working i notice that something was missing, in other systems there is a cable connecting the CD-ROM to the audio card, with that you can listen to music (analog) without sofware running. The Amiga has his own sound system on board (well is possible to upgrade it…), so i think how i will connect my CD-ROM to the sound outputs without using the processor? I didn't want to modify the original RCAs that my A1200 board has, so the best option was to create a new par of RCAs. Usually CD-ROM come with a audio cable to connect a sound card (PC), the cable usually has 4 pins:

  • pin 1 - Left signal output
  • pin 2 - Ground
  • pin 3 - Ground
  • pin 4 - Right signal output

(there are cables with only 1 ground, i think)


So, what i did was:

  • the cd-rom cable connecter, goes obviously to the cd-rom
  • the other connecter that goes to the sound card, i cut it

now a soldering work:

  • the right signal output (pin 4) goes to the center pole of right RCA
  • the adjacent wire of the right signal output (pin 3) goes to the outer pole of right RCA

next step depends of type of cable, some sound blasters use one ground in pin 1 or 4, but the majority of card use both ground in pins 2 and 2 (in center)

  • the left signal output (pin 1) goes to the outer pole of left RCA
  • the adjacent wire of the right signal output (pin 2 ) goes to the center pole of left RCA

If sound doesn't look good, or some channel is missing, try to swap pins (3 and 4) or (1 and 2), so try it, before soldering.

Now that i had the RCAs created, i needed a place to put them, my A1200 Tower has some slots available (not using any so far) so i though it was the only logical place to put them, but i need a slot slot cover. I found na old parallel slot in basement, so i use it to hold down the RCAs. I remove the parallel connecter, cut it to host the RCAs. to fill the empty spaces and to give a solid work i use hot glue, to get all together, after, i cuted the excess glue and just painted white.

It is not yet finnish but you can get a look about what it will be.

Additional Reading

See also:

Reference

Project Gallery

Mini A1200

"A1200T back with RCAs image 1" Case back

Additional Reading

See also:

Reference

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