Hello, my name is Tomek and.... I am new to this forum and to...digital audio. In my plans is to build NonozII DAC, by Fedde, and Cd transport based on CD Rom. I did try to search the forum for similar posts, but no result. From my web searches on the subject, I found some circuits, which let to convert TTL digital CD Rom output to SPDIF. So, this part is done. What I could not find is a schematic of good power supply for CD rom. Has anyone a schematic of good, regulated power supply?
Also, I want to put CD rom in its own enclosure. To further damp vibrations I want to mount CD Rom brackets on Sorbothane pads. This step will also separate cd rom enclosure from physical ground of aluminum enclosure. Should I connect cd rom enclosure to ground of my main chasse?
And... one more problem. I got few older CD Roms, which are in very good condition. All transports are made of aluminum alloy, and they are suspended on springs. I thought to use them in my future projects. They are of SCSI type. They do not have digital output, and front Play/Stop buttons. Is it possible to add controler with Play/Stop buttons, and get digital out from them?
Thank you very much for your help, Regards tomek
Also, I want to put CD rom in its own enclosure. To further damp vibrations I want to mount CD Rom brackets on Sorbothane pads. This step will also separate cd rom enclosure from physical ground of aluminum enclosure. Should I connect cd rom enclosure to ground of my main chasse?
And... one more problem. I got few older CD Roms, which are in very good condition. All transports are made of aluminum alloy, and they are suspended on springs. I thought to use them in my future projects. They are of SCSI type. They do not have digital output, and front Play/Stop buttons. Is it possible to add controler with Play/Stop buttons, and get digital out from them?
Thank you very much for your help, Regards tomek
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Searching from Internet...
An externally hosted image should be here but it was not working when we last tested it.
2.
An externally hosted image should be here but it was not working when we last tested it.
Searching from Internet...
There is another thread with some links:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=14457&highlight=cdrom
http://www.diyaudio.com/forums/showthread.php?s=&threadid=14457&highlight=cdrom
Thanks for the response. MCLL, I would like to use schematic 1 for the PSU. Have you got bigger drawing? I can not read values of the components. And one really basic question: Both sections of the PSU contain pots. How to use them? Will they set output voltage, or .....something else? Where to connect voltmeter during adjustment?
12V
15V 1.5A Transformer
4A 50V Bridge
4700£gF 25V
5£[/1W
0.1£gF 100V
MJE2955 w/heatsink
LM317T w/heatsink
1K£[ VR (Pots)
100£[ 1/4W ¡@
1000£gF 25V
0.1£gF 100V
5V
7V 1A Transformer
2A 50V Bridge
4700£gF 16V
0.1£gF 100V
LM317T w/heatsink
500£[ VR (Pots)
100£[ 1/4W
1000£gF 16V
0.1£gF 100V
15V 1.5A Transformer
4A 50V Bridge
4700£gF 25V
5£[/1W
0.1£gF 100V
MJE2955 w/heatsink
LM317T w/heatsink
1K£[ VR (Pots)
100£[ 1/4W ¡@
1000£gF 25V
0.1£gF 100V
5V
7V 1A Transformer
2A 50V Bridge
4700£gF 16V
0.1£gF 100V
LM317T w/heatsink
500£[ VR (Pots)
100£[ 1/4W
1000£gF 16V
0.1£gF 100V
An externally hosted image should be here but it was not working when we last tested it.
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