CD-ROM Power schematic Correct?

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 11:58 am

My "GP" PIC-based console is going to use discs as the primary way of storing games. What I plan on doing is storing the games using audio, similair to the way that old computer's used cassette tapes to store data. I think this should be fairly easy, since almost all IDE CD-ROM drives have audio connectors at the back. But what I need to get around first is powering the drive. Here's a schematic I came up with:

Would it work to power the drive? Also, how much mAH does your average CD-ROM drive draw when reading an audio disc (at 1x I assume).

I would of posted this in F42, but well, try to figure out why I didn't. Besides, PICs are 8-bit (well the ones i'm using are), so this kind of belongs in the 8-bit forum then.

Post by **marshallh** » Sat May 13, 2006 12:08 pm

Yes, that looks fine. Don't know why you want all those capacitors, because 7805s are pretty good at keeping a steady output (as well as wasting energy.)

Another idea: Use a CD drive that has a digital audio output. They're harder to find but will save you circuitry for an ADC. (Sound output from a normal cdrom drive is analog)

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 12:16 pm

marshallh wrote:Yes, that looks fine. Don't know why you want all those capacitors, because 7805s are pretty good at keeping a steady output (as well as wasting energy.)

Ok, good. About the caps? Because I can.

marshallh wrote:Another idea: Use a CD drive that has a digital audio output. They're harder to find but will save you circuitry for an ADC. (Sound output from a normal cdrom drive is analog)

Alright, i'll keep that in mind.

Does anybody know the amperage draw of a CD-ROM drive reading at 1x?

arfink · Post by **arfink** » Sat May 13, 2006 12:34 pm

ok, maybe a stupid question, but what exactly are you trying to build? Will it run NES games? Or only special games that you program for it? I don't think I get it. So you download an MP3 that contains game data embedded in the music and when you burn it on a CD you can play it on this thing? I am very confused.

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 12:37 pm

It's not an NOAC at all. It's a custom console me and a friend are developing and it will run our own games programmed with our own code. basically the sound file(s) are burned on to the disc and the console can interpret that as machine code. Think Apple II programs on tapes...

jeroen · Post by **jeroen** » Sat May 13, 2006 12:41 pm

Something like the atari game recorder for your own gaming system?

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 1:06 pm

Yup, pretty much, except on discs instead of tapes.

jeroen · Post by **jeroen** » Sat May 13, 2006 1:08 pm

yeah ok. I've been thinking about getting that black art of video game console design book for a while and make my own system too.

I'm happy somebody else had the same idea. Is it ok if I go sony on your disk audio system?

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 1:10 pm

Go for it! Although, i'm sure our format/standard of the way the data is stored will be different.

jeroen · Post by **jeroen** » Sat May 13, 2006 1:11 pm

Yeah prob. Maybe i'll make a music converter too convert music too play on it. Or i'll just make a switch or menu for it.

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 9:00 pm

Current draw? Also, this could probably be moved to the new tech forum.

joevennix · Post by **joevennix** » Sat May 13, 2006 9:06 pm

I thought you were joking when you said you were making your own game console...
*bows down

Post by **marshallh** » Sat May 13, 2006 9:10 pm

If you want to know the current draw of the cd-rom drive, why not just measure it yourself? Just measure each line seperately and add the numbers up. Don't tell me you don't know how to measure current draw :S

I'll give you a cookie if you actually make a working system with this.

blackbox_dev · Post by **blackbox_dev** » Sat May 13, 2006 9:13 pm

Nope! No jokes here!

Klefmung · Post by **Klefmung** » Sat May 13, 2006 9:16 pm

I will rob the cookie and steal the console. >_> So, what kind of console will this be? 32 bit? 8 bit? maybe something else? eh? eh?