Building a symmetrical psu B1 buffer - Page 19 - 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 6th October 2009, 07:07 PM   #181
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Okay, no music. No relay click. The LED near the LM7805 is not on. I get 5V and 10V on BC556 and 2SK170 in the B1 circuit.
I get 5V from the LM7805 and 5V across the parallel resistors that feed the relay. I also get 5V on 2k2 feeding LED. Suppose I should replace LED.
Ri
__________________
purchase LDRs anytime Also try my Resistor Replacers or LDR based Input Selector Email me. diyldr@gmail.com
  Reply With Quote
Old 6th October 2009, 07:15 PM   #182
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
npapp:

4 non matched Leds and 1k trimmers connected as rheostats instead of the fifth Led. Use pins in the 5th place and crocodile clips, so you will not unsolder anything and destroy the pads. After you set it, measure the trimmers and substitute resistors upright soldered on those pins. They will be different.
  Reply With Quote
Old 6th October 2009, 07:15 PM   #183
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Used 9V battery and 100R resistor and tested relay. It works.
Uriah
__________________
purchase LDRs anytime Also try my Resistor Replacers or LDR based Input Selector Email me. diyldr@gmail.com
  Reply With Quote
Old 6th October 2009, 07:17 PM   #184
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by udailey View Post
Okay, no music. No relay click. The LED near the LM7805 is not on. I get 5V and 10V on BC556 and 2SK170 in the B1 circuit.
I get 5V from the LM7805 and 5V across the parallel resistors that feed the relay. I also get 5V on 2k2 feeding LED. Suppose I should replace LED.
Ri
7805?

7812 hello!
  Reply With Quote
Old 6th October 2009, 07:23 PM   #185
billyk is offline billyk  United States
diyAudio Member
 
billyk's Avatar
 
Join Date: Oct 2005
Location: North Central Mass, USA
Quote:
Originally Posted by Salas View Post
7805?

7812 hello!
Beat me to it!
  Reply With Quote
Old 6th October 2009, 07:26 PM   #186
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Hey be gentle I thought if using 5V relay we are to use 7805, no?
__________________
purchase LDRs anytime Also try my Resistor Replacers or LDR based Input Selector Email me. diyldr@gmail.com
  Reply With Quote
Old 6th October 2009, 07:37 PM   #187
billyk is offline billyk  United States
diyAudio Member
 
billyk's Avatar
 
Join Date: Oct 2005
Location: North Central Mass, USA
Logical conclusion, but that is what the resistors are for. It is jumpered for 12v relay and the resistors are for the 5v relays.
  Reply With Quote
Old 6th October 2009, 07:40 PM   #188
udailey is offline udailey  United States
diyAudio Member
 
Join Date: Mar 2008
Okay. I had read Jean Paul talking about 5V relays and 7805 so I just assumed. Well thats easy. Be right back
__________________
purchase LDRs anytime Also try my Resistor Replacers or LDR based Input Selector Email me. diyldr@gmail.com
  Reply With Quote
Old 6th October 2009, 07:43 PM   #189
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Don't go jumper the resistors and keep the 7805. Without 7812 the driving circuit won't open. Its 7812, jumper, 12V relay, or 7812, resistors, 5V relay. No 7805.
  Reply With Quote
Old 6th October 2009, 08:31 PM   #190
npapp is offline npapp  United States
diyAudio Member
 
Join Date: Feb 2006
Location: New Jersey
Quote:
Originally Posted by Salas View Post
npapp:

4 non matched Leds and 1k trimmers connected as rheostats instead of the fifth Led. Use pins in the 5th place and crocodile clips, so you will not unsolder anything and destroy the pads. After you set it, measure the trimmers and substitute resistors upright soldered on those pins. They will be different.
Perfect, thanks I will report back soon.
  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
New-building of my B1 buffer Babowana Pass Labs 328 20th February 2010 01:14 AM


New To Site? Need Help?

All times are GMT. The time now is 09:53 AM.


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