Plextor drives used to have the reputation of being the best. Older IDE ones should be pretty cheap. They usually have basic player buttons on the front panel so you could use them as-is without building an IDE controller.
Using An ATX Power Supply
BTW-
If anyone wants to use a PC ATX power supply to run a CD-ROM without a motherboard (as a test maybe), just jumper the green wire connector to a black ground wire. Use a covered wire for safety. The large connector is the main power source for the motherboard.
It's best to use a PS with a rear power switch. If the PS doesn't have one, you'll have to use a switch between the green to ground.
Vince
BTW-
If anyone wants to use a PC ATX power supply to run a CD-ROM without a motherboard (as a test maybe), just jumper the green wire connector to a black ground wire. Use a covered wire for safety. The large connector is the main power source for the motherboard.
It's best to use a PS with a rear power switch. If the PS doesn't have one, you'll have to use a switch between the green to ground.
Vince
dangus said:
Good idea, but I can't remember the last time I saw one... Might be 8-10 yrs ago since they made them with buttons for disk control. If you have computer swap meets around with older stuff, might be worth searching there for one.
Unless I'm wrong, and there's still a model or two out there with them...
Samsung are trush,
Audio Analogue have many problem with this CDROM
Use TEAC CDROM or Philips CDW
Audio Analogue have many problem with this CDROM
Use TEAC CDROM or Philips CDW
Can't find DAC in the drive
Hello everyone! I found good drive to play with. It is Plextor PX-12TSi It has SCSI bus(not IDE) and no digital output, just analaog. So I was wondering if I could pick the data somwhere between DAC and decoder. What I found shocked me a bit. It has a TC9430F chip by TOSHIBA wich is all-in-one and has a 1-bit DAC. But it is SINGLE cahnnel DAC... no stereo kinda... I traced routes from audio amplifier. They go to the SMD components that I believe are DAC output filters. The routes from filters go in the TC9430.
By the way alldatasheet.com has no data on that chip, only on TC9432F. TOSHIBA site just says that it is all-in-one decoder for CD-ROM. And again ONE 1-bit DAC...
I checked all chips onboard if they are DAC. Nope... One uC for contol, one servo chip, one SCSI interface, etc.
So now I am in the confusion. Is it worth it or should I take normal IDE drive? The reason I picked Plextor is reputation and it has play\stop\FFD buttons on. And in most cases that's what I use... But I do not know how good DAC is and if it is "honest stereo" or multiplexed MONO.
I have another drive with buttons, it works as well and is extremly quiet. The model is Wearnes CDD-620.
It has separate chip 16-bit DAC inside. SANYO LC78815M. An old chip, but I think it could be replaced... wich is good. But this drive has no digital output as well.... wich is not good.
So, what would be your advice?
If you will tell me go for normal IDE drive I'll have to design new control board. I will use ATMEGA uC and it will take a while to fix all bugs... would not like to spend too much time on it...
Hello everyone! I found good drive to play with. It is Plextor PX-12TSi It has SCSI bus(not IDE) and no digital output, just analaog. So I was wondering if I could pick the data somwhere between DAC and decoder. What I found shocked me a bit. It has a TC9430F chip by TOSHIBA wich is all-in-one and has a 1-bit DAC. But it is SINGLE cahnnel DAC... no stereo kinda... I traced routes from audio amplifier. They go to the SMD components that I believe are DAC output filters. The routes from filters go in the TC9430.
By the way alldatasheet.com has no data on that chip, only on TC9432F. TOSHIBA site just says that it is all-in-one decoder for CD-ROM. And again ONE 1-bit DAC...
I checked all chips onboard if they are DAC. Nope... One uC for contol, one servo chip, one SCSI interface, etc.
So now I am in the confusion. Is it worth it or should I take normal IDE drive? The reason I picked Plextor is reputation and it has play\stop\FFD buttons on. And in most cases that's what I use... But I do not know how good DAC is and if it is "honest stereo" or multiplexed MONO.
I have another drive with buttons, it works as well and is extremly quiet. The model is Wearnes CDD-620.
It has separate chip 16-bit DAC inside. SANYO LC78815M. An old chip, but I think it could be replaced... wich is good. But this drive has no digital output as well.... wich is not good.
So, what would be your advice?
If you will tell me go for normal IDE drive I'll have to design new control board. I will use ATMEGA uC and it will take a while to fix all bugs... would not like to spend too much time on it...
Toshiba seems to state both chips use have the same package and features, except that the TC9430 accepts 12x playback speed while the TC9432 is only 8x.
IF they're the same thing otherwise :
http://www.datasheetarchive.com/TC9432F-datasheet.html
It should have a 1-bit stereo DAC. Pin 82 = Right Output and pin 85 = Left Output.
The chip even has an SPDIF output pin and an I2S output. (About every CD-ROMs have a spdif output on their controller chip, but on older models it doesn't have any trace. You're lucky, this one has I2S.)
LRCK : Pin 5
BCK : Pin 7
DATA : Pin 8
SPDIF : Pin 9
IF they're the same thing otherwise :
http://www.datasheetarchive.com/TC9432F-datasheet.html
It should have a 1-bit stereo DAC. Pin 82 = Right Output and pin 85 = Left Output.
The chip even has an SPDIF output pin and an I2S output. (About every CD-ROMs have a spdif output on their controller chip, but on older models it doesn't have any trace. You're lucky, this one has I2S.)
LRCK : Pin 5
BCK : Pin 7
DATA : Pin 8
SPDIF : Pin 9
Thanks a lot! I got the datasheet on 9432 and brobably missed L\R outputs. My bad...
OK. will dig this one for now.
OK. will dig this one for now.
Happy but missing buttons control Play/Stop….
Hi!
Today I use a ordinary DVD-player from MSI I think. I take the SPDIF signal into my Harmony DAC. I really like the sound. I have compare it with a lot of commercial products in a far higher price level and sometime it sounds better… So I’m happy with my solution.
What I’m missing is the control of Play/stop pause forward with buttons and I cant remember where you make this really work in this string. Please help me, or in another string.
Hi!
Today I use a ordinary DVD-player from MSI I think. I take the SPDIF signal into my Harmony DAC. I really like the sound. I have compare it with a lot of commercial products in a far higher price level and sometime it sounds better… So I’m happy with my solution.
What I’m missing is the control of Play/stop pause forward with buttons and I cant remember where you make this really work in this string. Please help me, or in another string.
I am going to make a control board. There some DIY progects in this thread but they are based on the old chips. I'd like to use ATMEGA128. Probably will do it on ASM. If I will get something that works - I'll post it here.
First plan is to make control buttons and may be some control functions for the drive. Like speed settings for example.
Than, if I stiil will have interest I'll do display, remote, CD-text etc...
First plan is to make control buttons and may be some control functions for the drive. Like speed settings for example.
Than, if I stiil will have interest I'll do display, remote, CD-text etc...
Well, I think that C would be easier to maintence, repair and update (new functions etc.) as it is more compreensive than ASM.
Yes and no.
ASM allows me to write exactly what I want and it will work the way I want.
On C I describe in general what I want from the device and compiler takes care about how to make it to work.
Due to the relatively simple but specific AVR architecture the mainetance will be very similar for ASM and C. Porting on another AVR will be easier on ASM. Porting on other uC or CPU will be easier on C.
Everything is relative.
I know ASM better and made a lot of progects on it. I still struggle with C. That's why developing the firmware on C will take longer for me. Plus I bet it will be a lot of bugs in my code.
But I agree that for the open source progects and public progects C is better. So I will go for C.
For now I made PSU and tested it with the drive. As far as I like to test SW when I write it I am making a PCB for the progect.
Will put power connector, 40pin IDE socket for the standard ribbon cable, 16-pin LCD connector, 6-pin keyboard connector, and may be one or two pins for remote receiver.
Any ideas or corrections?
By the way, I can put buttons right on the control board, but this will limit you in case size. So I decided to make keyboard connector.
ASM allows me to write exactly what I want and it will work the way I want.
On C I describe in general what I want from the device and compiler takes care about how to make it to work.
Due to the relatively simple but specific AVR architecture the mainetance will be very similar for ASM and C. Porting on another AVR will be easier on ASM. Porting on other uC or CPU will be easier on C.
Everything is relative.
I know ASM better and made a lot of progects on it. I still struggle with C. That's why developing the firmware on C will take longer for me. Plus I bet it will be a lot of bugs in my code.
But I agree that for the open source progects and public progects C is better. So I will go for C.
For now I made PSU and tested it with the drive. As far as I like to test SW when I write it I am making a PCB for the progect.
Will put power connector, 40pin IDE socket for the standard ribbon cable, 16-pin LCD connector, 6-pin keyboard connector, and may be one or two pins for remote receiver.
Any ideas or corrections?
By the way, I can put buttons right on the control board, but this will limit you in case size. So I decided to make keyboard connector.
Is ATMEGA128 a chip for Pic-programming? I think I easy to use and put programs made for PIC kode. Where can I find that? I have seen solution that you connect to the IDE-port with PIC Please help…
I see that -_nando-_ have a nice circuit :
http://www.diyaudio.com/forums/attachment.php?s=&postid=1009238&stamp=1158691535
Where can I find the PIC-code for this?
Some one who can recommend something else like this? I’m really want to build some thing like that.
http://www.diyaudio.com/forums/attachment.php?s=&postid=1009238&stamp=1158691535
Where can I find the PIC-code for this?
Some one who can recommend something else like this? I’m really want to build some thing like that.
It is sad and funny that ones one has a working "anything" he wants some money for it. This is DIY forum, I thought it is more like opensource community.🙄
Are you refering to Pradit ? He have an open version of his controller that doesn't have the remote receiver, and doesn't work very well, and another commercial version that might work well and have the remote controller...
I'm not refering to anyone in particular. It's just my understanding that if you discuss your design with people you should share the results. Just because it's not only your's design any more. But it's my bug, nevermind...
On the subgect:
Would anybody mind if I'll make ISP pins with shared functions?
I consider 5 buttons for the keyboard. PLAY, STOP, FFD,REW, PAUSE. Should I make EJECT ? Or any other? Or the one on the drive will do?
On the subgect:
Would anybody mind if I'll make ISP pins with shared functions?
I consider 5 buttons for the keyboard. PLAY, STOP, FFD,REW, PAUSE. Should I make EJECT ? Or any other? Or the one on the drive will do?