Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Finally, an affordable CD Transport: the Shigaclone story
Finally, an affordable CD Transport: the Shigaclone story
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 27th February 2012, 07:55 AM   #5441
tvicol is offline tvicol  Europe
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Finally, an affordable CD Transport: the Shigaclone story Finally, an affordable CD Transport: the Shigaclone story
Quote:
Originally Posted by syklab View Post
Hi Tibi,
I think Q2 should be 2SB764.
Yes, you are right. IŽll correct this as well.

Regards,
Tibi
__________________
Vicol Audio
  Reply With Quote
Old 27th February 2012, 08:10 AM   #5442
massimo is offline massimo  Italy
diyAudio Member
 
Join Date: Dec 2002
Location: Milan, Italy
Quote:
Originally Posted by tvicol View Post
massimo,

Can you please give me a link to AD151 datasheet and a source for component ?

IŽm not sure I understand completely what N.O. buttons are you referring too. Do you have a draw ?

Regards,
Tibi
Regs: I wrote AD151 having in mind the maker, Analog Device, but the correct designation is ADP151, sorry. With these regs you save a cap
ADP151 | Ultra Low Noise, 200 mA CMOS Linear Regulator | Linear Regulators | Power Management | Analog Devices

Normally Open (N.O.) switches are the one used fo Play, Stop, forward skip and back skip. For the "cd door switch" you need a Normally Closed (N.C.) switch and push it (disconnecting IC's pin from GND) to start reading the disc. Thus you cannot use the same buttons.
  Reply With Quote
Old 27th February 2012, 08:23 AM   #5443
tvicol is offline tvicol  Europe
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Finally, an affordable CD Transport: the Shigaclone story Finally, an affordable CD Transport: the Shigaclone story
Quote:
Originally Posted by massimo View Post
Regs: I wrote AD151 having in mind the maker, Analog Device, but the correct designation is ADP151, sorry. With these regs you save a cap
ADP151 | Ultra Low Noise, 200 mA CMOS Linear Regulator | Linear Regulators | Power Management | Analog Devices

Normally Open (N.O.) switches are the one used fo Play, Stop, forward skip and back skip. For the "cd door switch" you need a Normally Closed (N.C.) switch and push it (disconnecting IC's pin from GND) to start reading the disc. Thus you cannot use the same buttons.
massimo,

Thanks for the info.
ADP151 input voltage range is too low to be used in this application (2,2V to 5,5V). We need a reg with at least 8V input. Also the regulator need to be able to dissipate at least 150mW in normal operation.
However, his very low noise and low footprint make him suitable to Vref syklab is talking about.
IŽll take in consideration to use him in Vref.

OK I got your point. Will search for a N.C. switch.

Regards,
Tibi
__________________
Vicol Audio

Last edited by tvicol; 27th February 2012 at 08:33 AM.
  Reply With Quote
Old 27th February 2012, 09:13 AM   #5444
tvicol is offline tvicol  Europe
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Finally, an affordable CD Transport: the Shigaclone story Finally, an affordable CD Transport: the Shigaclone story
Default ADP151

massimo,

Even LP5900 is a strong candidate, this is not available in TSOT package, therefore very hard to work with from DIY perspective.

ADP151 is available in TSOT package, but not available on mouser, farnell or tme.
Do you have a source for ADP151AUJZ-2.5-R7 5-Lead - TSOT package ?

Regards,
Tibi
__________________
Vicol Audio
  Reply With Quote
Old 27th February 2012, 02:04 PM   #5445
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Quote:
Originally Posted by tvicol View Post
massimo,

Thanks for the info.
ADP151 input voltage range is too low to be used in this application (2,2V to 5,5V). We need a reg with at least 8V input. Also the regulator need to be able to dissipate at least 150mW in normal operation.
However, his very low noise and low footprint make him suitable to Vref syklab is talking about.
IŽll take in consideration to use him in Vref.

OK I got your point. Will search for a N.C. switch.

Regards,
Tibi
Or, you could use a 74AHC1G06 (single gate open drain inverter) to invert the polarity of the signal and use the same switch for all positions.
  Reply With Quote
Old 27th February 2012, 03:03 PM   #5446
tvicol is offline tvicol  Europe
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Finally, an affordable CD Transport: the Shigaclone story Finally, an affordable CD Transport: the Shigaclone story
Quote:
Originally Posted by TheGimp View Post
Or, you could use a 74AHC1G06 (single gate open drain inverter) to invert the polarity of the signal and use the same switch for all positions.
It is a valid suggestion and I'll keep it as last resort.
I prefer to keep things simple.

Regards,
Tibi
__________________
Vicol Audio
  Reply With Quote
Old 27th February 2012, 05:07 PM   #5447
BMW850 is offline BMW850  Netherlands
diyAudio Member
 
BMW850's Avatar
 
Join Date: Aug 2004
Location: North East of the Netherlands
This is nice to see that everyone helps each other to reach a good end result
Tibi continue with the good work

Regards,
Rudy
__________________
It’s not what you know, but who you know “and where they are”
  Reply With Quote
Old 27th February 2012, 05:30 PM   #5448
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Hmmm. Actually a couple of resistors and a transistor would work just as well.

The only advantage of inverting the signal is to eliminate the NC switch and use all NO switches.

This simplifies the BOM and makes purchasing parts easier at the expense of the additional resistors and transistor.

With regards to the ADP151, one could pre-regulate the 8V supply down to 5V with a 7805 to generate a supply that is supportive. Again, it adds components. However if 8V tolerant low noise regulators are difficult to source it may be worth investigating.
  Reply With Quote
Old 27th February 2012, 06:32 PM   #5449
Nomdi is offline Nomdi  France
diyAudio Member
 
Join Date: Sep 2011
A L7941 is a serious outsider to replace a 7805...
@tibi : could you consider to add 2 capacitors
to replace the ceramic resonator with a regular quartz ?
Good a low cost upgrade to my mind...
  Reply With Quote
Old 27th February 2012, 06:43 PM   #5450
tvicol is offline tvicol  Europe
diyAudio Member
 
tvicol's Avatar
 
Join Date: Jan 2005
Location: Bucharest
Finally, an affordable CD Transport: the Shigaclone story Finally, an affordable CD Transport: the Shigaclone story
Quote:
Originally Posted by BMW850 View Post
This is nice to see that everyone helps each other to reach a good end result
Tibi continue with the good work

Regards,
Rudy
Thank you, Rudy !

Regards,
Tibi
__________________
Vicol Audio
  Reply With Quote

Reply


Finally, an affordable CD Transport: the Shigaclone storyHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


New To Site? Need Help?

All times are GMT. The time now is 03:12 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki