I was very interested when I read that it is possible to turn off oversampling in the Philips CD-723 and the likes, but now that I have a CD-723 ready for surgery... I can't find the source code to program the hacker!
It was discussed here Thread on 723-Hacker , but the site is now unavailable
Did someone save it? I'd really appreciate.....
Cheers
Andrea
It was discussed here Thread on 723-Hacker , but the site is now unavailable
Did someone save it? I'd really appreciate.....
Cheers
Andrea
Thank you very much, now I need to find a Atmel AT90S1200 and a suitable programmer😀
Cheers
Andrea
PS Did you try it out?
Cheers
Andrea
PS Did you try it out?
I contacted Robinet on this a week ago, he's gonna try to get the site up again.
Btw, if you send him a controller, he'll send it back to you programmed.
Btw, if you send him a controller, he'll send it back to you programmed.
Actually he is the first person I contacted (trough the mail service of the forum) but didn't get a reply, so I asked here.
As for programming, if someone already has a excess Atmel chip and is willing to program it for me it would be really great (of course he'll be rewarded for that 😉 ) , otherwise I'll have to go and search for a chip and dig up my old Willeprom programmer (DIYed) that IIRC can program these chips.
Cheers
Andrea
As for programming, if someone already has a excess Atmel chip and is willing to program it for me it would be really great (of course he'll be rewarded for that 😉 ) , otherwise I'll have to go and search for a chip and dig up my old Willeprom programmer (DIYed) that IIRC can program these chips.
Cheers
Andrea
Great news!
A few days after my las post on this thread Robinet replied me and sent me the file with all the info needed.
Today I got my Atmel chips and, after finding that at my workplace we have a programmer that supports it.. I quickly assembled the board and tried it: success!! It worked a charm.
Here is a piccy of the hacker in action:
A few days after my las post on this thread Robinet replied me and sent me the file with all the info needed.
Today I got my Atmel chips and, after finding that at my workplace we have a programmer that supports it.. I quickly assembled the board and tried it: success!! It worked a charm.
Here is a piccy of the hacker in action:
Attachments
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How much did you spend for this project? Could you eleaborate a bit... seems like an interesting project..
tschrama said:
As my signature suggests I like to be cheap ;-)
The CD723 was about ˆ40 (ebay)
The Atmel chip is very cheap and the circuit uses 5-6 components
The most costly thing is Thorsten's designed output stage for TDA1545A, that can cost up to 100 or more ˆ depending on the components you use. I already had almost everything in stock (including some beautiful Mullard E88CC NOS) so I didn't break the balance.
A description of Thorsten's original modification is here: http://www.ptsoundlab.com/sources/lectcd/philips723/phil723.htm , be warned that for NON-OS you have to change some values as T. discussed in a earlier thread. http://www.diyaudio.com/forums/showthread.php?s=&threadid=48718&perpage=10&highlight=&pagenumber=2
BTW I actually found a credit for T. in this webpage, but it is hidden by its crazy layout.
The hacker allows you to use the TDA1545A in NON-OS mode, but also to throw in a TDA1541A (it programs the SAAxxx chip to output IIS !!), so you only have to choose what to do!
Another thing to do is to tweak the PS as suggested in many places (Nuuk's site and others)
Hope it is enough!
Cheers
Andrea
Hi,
Is programming the microcontroller a relatively simple task?
I have a cd723, and also a cdpro mechanism that is gathering dust.
Regards,
Ashley.
Is programming the microcontroller a relatively simple task?
I have a cd723, and also a cdpro mechanism that is gathering dust.
Regards,
Ashley.
ash_dac said:
It is pretty trivial, since the hex file has already been compiled and is ready to be "burned" into the uC. You just need to have a suitable programmer and a chip (AT90s1200)
Cheers
Andrea
Maybe the issue still is of some interst - Robinetron's site (in french) is up again and can be found here: http://robinetron.free.fr/cd723/cd723.html
If someone is in need of it I should have a spare Atmel chip and also the possibility to program it.
Can program and send it (covering the bare costs of chip and postage) to the first that makes request.
Cheers
Andrea
Can program and send it (covering the bare costs of chip and postage) to the first that makes request.
Cheers
Andrea
Andrea, I have a second CD723 here waiting for modification. It cost me just one penny on Ebay so I guess it truly qualifies for your 'frugal-phile' tag! 😉
Now, if only I could buy some cheap time on Ebay too.....🙁
Now, if only I could buy some cheap time on Ebay too.....🙁
Nuuk said:
Hello Nuuk,
unfortunately the spare chip I got is already spoken for.
If you don't succeed in buying some time on Ebay soon 😀 next time I make a order to my supplier I can add another AT90S1200 for you, or if you have one you can send it to me and I will program it and send it back to you.
Cheers
Andrea
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