Scalable PSU/regulator GB - Page 3 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 March 2006, 05:46 PM   #21
diyAudio Member
 
BobEllis's Avatar
 
Join Date: Sep 2003
Location: Upstate NY
Hi Andrew,

I'll put another blank line in the wiki. In the future, you can just copy the line, paste twice then fill in your info using the top line.

I haven't looked into pricing since the beginning. I figure we should wait for the design to stabilize. The usual breaks are around 50 pieces apart, though.

Bob
  Reply With Quote
Old 18th March 2006, 06:00 PM   #22
infinia is offline infinia  United States
diyAudio Member
 
infinia's Avatar
 
Join Date: May 2005
Location: Californication
Hi

1) What are the baseline part values for 15V 1A load step design.

2) Recommended XFMR for 15V 1A (standard part if possible)

3) will the design work for 12V 1A ex for changing 1 resistor?

Thanks
__________________
like four million tons of hydrogen exploding on the sun
like the whisper of the termites building castles in the dust
  Reply With Quote
Old 18th March 2006, 07:49 PM   #23
diyAudio Member
 
BobEllis's Avatar
 
Join Date: Sep 2003
Location: Upstate NY
Since we don't yet have a final design, 15V part values are not defined. One design goal is to make voltage changes as simple as changing a resistor or two.

I'm working on buying a large number of Avel dual 15V 50VA transformers which should be suitable for most crossover needs (one will handle 4 fully stuffed filter boards without using half of its VA rating).

If you want to provide an amp continuously, you ought go up a bit to give your transformer some wiggle room, say 100VA. You can use anything with enough AC voltage to cover the filter and regulator losses. I figure with 15VAC, we'll have about 6V to cover diode drops, CRC losses and still give the regulator a bit of room to work while giving us 15V out. You'll need to adjust the R in the CRC to balance ripple, voltage loss and power dissipation in the R and regulator. I guess I'll need to write up another set of instructions.
  Reply With Quote
Old 18th March 2006, 08:28 PM   #24
cotdt is offline cotdt  United States
diyAudio Member
 
Join Date: Oct 2005
Send a message via AIM to cotdt
Cool, I'm interested in the kit. Should be useful to power amps and crossovers.
  Reply With Quote
Old 18th March 2006, 11:25 PM   #25
infinia is offline infinia  United States
diyAudio Member
 
infinia's Avatar
 
Join Date: May 2005
Location: Californication
I just thought the design had baseline values since Jens had published step load performance.
Interested in starting the analysis of this design before I decided to sign up.

I'm thinking of running the 3 xover boards at 12Vdc. No reason to run them higher than that and wasting power/heat.
__________________
like four million tons of hydrogen exploding on the sun
like the whisper of the termites building castles in the dust
  Reply With Quote
Old 18th March 2006, 11:53 PM   #26
diyAudio Member
 
BobEllis's Avatar
 
Join Date: Sep 2003
Location: Upstate NY
Jens changed the topology since publishing the step response.

Fear not, once the design is stable, we'll publish values.
  Reply With Quote
Old 19th March 2006, 12:12 AM   #27
kro5998 is offline kro5998  Netherlands
diyAudio Member
 
Join Date: Dec 2004
Location: Tilburg
I have some 2 x 14Vac 1 Amp transformers laying around that i will use.1 Amp, should be more then enough for 2 boards.

Per, there is no need for a super regulator since the most used Opamps have a pssr of over 100 db. theoretically just a rectifier and a cap will do just fine.

kro5998
  Reply With Quote
Old 19th March 2006, 12:25 AM   #28
diyAudio Member
 
BobEllis's Avatar
 
Join Date: Sep 2003
Location: Upstate NY
Kro -

No we're not planning to go nuts with this. We're (Jens is doing the heavy lifting) trying to come up with a regulator that can be used for more than 15V opamp circuits and still be reasonably easy and inexpensive to build . Thinking of things like powering the front end of an amp or a discrete preamp.
  Reply With Quote
Old 19th March 2006, 12:58 AM   #29
infinia is offline infinia  United States
diyAudio Member
 
infinia's Avatar
 
Join Date: May 2005
Location: Californication
Hi
Look at using zeners in the range 4 - 6 Volts for lowest noise.
might have to add a trim pot to eliminate high precision zeners and voltage setting resistors. Maybe a red LED instead of zener.
__________________
like four million tons of hydrogen exploding on the sun
like the whisper of the termites building castles in the dust
  Reply With Quote
Old 19th March 2006, 01:15 AM   #30
kro5998 is offline kro5998  Netherlands
diyAudio Member
 
Join Date: Dec 2004
Location: Tilburg
Bob. I didn't intend to offend anybody but i think a lot of us just need a good PSU for the filter.

kro5998
  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
Zener regulator with "integrated" pre-regulator 00940 Power Supplies 17 22nd July 2008 05:11 PM
Lithos regulator - A new super regulator? peranders Parts 7 8th May 2008 02:01 PM
Scalable Power Supply GB BobEllis Solid State 0 3rd April 2006 05:11 PM


New To Site? Need Help?

All times are GMT. The time now is 07:09 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