Wanted : design PCB for relay controlled volume - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 18th January 2003, 07:00 PM   #1
diyAudio Member
 
ElectroNick's Avatar
 
Join Date: Dec 2002
Location: The Netherlands
Default Wanted : design PCB for relay controlled volume

I'm looking for a PCB design for a relay controlled volume potmeter.
Anyone made such a PCB ? I'm trying to build a system like shown in the Pass Aleph P manual.
It looks that relay control has less problems/costs than a analog pot (unless u use a stepped switch)

So if anyone made such thing or has ideas of usefull links....please !

Gr,
Nick
  Reply With Quote
Old 18th January 2003, 07:13 PM   #2
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
yeah id like to get one too.
  Reply With Quote
Old 18th January 2003, 08:12 PM   #3
xsnailx is offline xsnailx  Poland
diyAudio Member
 
xsnailx's Avatar
 
Join Date: Dec 2002
Location: Poland, Cieszyn
Send a message via AIM to xsnailx Send a message via MSN to xsnailx Send a message via Yahoo to xsnailx
i would be intersted too
  Reply With Quote
Old 18th January 2003, 10:45 PM   #4
diyAudio Member
 
macka's Avatar
 
Join Date: Dec 2001
Location: Australia
Guys,

Do a search for Panos29, you will find a layout there designed by Panos using the ADC804 for the 64 step ladder as per the Aleph V1.00 volume control.

If you care to be patient however , Wayne Coburn of Passlabs has a remote passive preamp project in the wings which I understand will be 256 steps.

I should think this will be an excellent design looking at Wayne's previous handy work.

Good luck

Ian
  Reply With Quote
Old 18th January 2003, 10:49 PM   #5
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Quote:
Originally posted by macka
Guys,

Do a search for Panos29, you will find a layout there designed by Panos using the ADC804 for the 64 step ladder as per the Aleph V1.00 volume control.

If you care to be patient however , Wayne Coburn of Passlabs has a remote passive preamp project in the wings which I understand will be 256 steps.

I should think this will be an excellent design looking at Wayne's previous handy work.

Good luck

Ian
when is he going to post info and laout plans or info to build it. Im under his wings and want his stuff. LOL..

J'
  Reply With Quote
Old 18th January 2003, 11:44 PM   #6
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default Aleph P

Hi, all!
I'm also building a new pre-amp, and my plan is to use a remote-kit from here; http://www.circuitsonweb.com/resourc...jects/mir.html
It's so cheap (compared to others) that I just had to take the chance...
I guess it probably will be easier to drive a motor-pot than a relay-based pot with this?

Arne K
NORWAY
  Reply With Quote
Old 19th January 2003, 12:46 AM   #7
Thomas is offline Thomas  Denmark
diyAudio Member
 
Thomas's Avatar
 
Join Date: May 2001
Location: Right here
Hi Nick

At this moment I'm doing a layout for the Aleph P volume control on a seperate PCB. I plan for a preamp made out of Aleph L circuitry but with aleph P 1.0 (ADC0804) style volume control.

I've finished boards for Aleph L1.2 PSU and Aleph L1.2 amp boards a few days ago and are currently doing the volume board. I wish to use 8 bits instead of only 6 as in Aleph P, but there is some instability issues in the LSB I have to solve.

If you are interested in this project you have to wait untill I'm finished. No, realy. It took me less than 1 week to do the PSU and amp boards, but I'm facing examens within three weeks, so I realy don't know. Maby one, maby four weeks.
  Reply With Quote
Old 19th January 2003, 11:22 AM   #8
panos29 is offline panos29  Greece
diyAudio Member
 
panos29's Avatar
 
Join Date: Dec 2001
Location: ATHENS, GREECE
Send a message via ICQ to panos29 Send a message via Yahoo to panos29
Default O.k!

So, as it seems, there is some some demand for my pcb design so I post it here. Note though that my design incorporates and alephL stage mated with aleph p volume control. I should also note that the volume has some kind of instability from time to time but nothing serious.(something has to do with the lsb bit of the adc0804, but i am not a digital wizard). The pre is built some 11 months ago and serves well til now. However I noticed on my scope that when the input is more than 4Volts there is some serious distortion on the waveforms, especially in low setting of the volume control that is probably due to the overloading of the output stage because of the powerfull signal on the small ohmic value of the low settings. If u use it full clockwise it works good to about 20volts rms output.

Sincerely,

Panos
Attached Files
File Type: zip l-mask+pcb.zip (80.4 KB, 1048 views)
  Reply With Quote
Old 19th January 2003, 01:37 PM   #9
loovet is offline loovet  Sweden
diyAudio Member
 
Join Date: Sep 2002
Location: Outside Stockholm
How about this one...
Attached Files
File Type: zip volume.zip (26.8 KB, 1212 views)
  Reply With Quote
Old 19th January 2003, 04:13 PM   #10
xsnailx is offline xsnailx  Poland
diyAudio Member
 
xsnailx's Avatar
 
Join Date: Dec 2002
Location: Poland, Cieszyn
Send a message via AIM to xsnailx Send a message via MSN to xsnailx Send a message via Yahoo to xsnailx
shouldnt we use latching relays instead
i know it is a tricky one but i think it is worth exploring
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Volume Remote Controlled for our GC?? thomgun_lc Chip Amps 11 28th May 2010 11:21 AM
Q For Those Who Know about Logic-Controlled Relay Attenuators thermionic Solid State 6 21st May 2008 02:07 PM
Relay Switch Controlled Bleeder Resistor DJ Exprice Chip Amps 0 7th December 2006 02:26 AM
Digitally Controlled Volume, Tone IC ?? metal Chip Amps 55 8th August 2005 11:35 AM


New To Site? Need Help?

All times are GMT. The time now is 01:48 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2