Highly Liquid Forum facebook twitter google plus rss feed
  #1  
Old 06-20-2011, 05:03 PM
vagadon vagadon is offline
Junior Member
 
Join Date: Jun 2011
Posts: 2
Default Rev A Documentation (was: Rev issues)

It took me so long to get around to building my MPA board, the REV A which I have, is no longer documented. All they have up is the REV B.

Can someone help me out here?

Also, are the digital pot chips directly swappable in-circuit with the other R value versions of the same chips?

thanks,
db
Reply With Quote
  #2  
Old 06-20-2011, 07:24 PM
John's Avatar
John John is offline
Moderator
 
Join Date: Jan 2009
Posts: 3,007
Default

Hi vagadon,

You can find the MPA Rev A assembly notes here:

http://forum.highlyliquid.com/showthread.php?t=1134

If you let me know the serial number on your microcontroller IC, I can point you to the firmware documentation.

The MCP42010/050/100 are all interchangeable and can be used in any MPA board.

Hope this helps--please let me know if I can provide more information.
Reply With Quote
  #3  
Old 06-21-2011, 12:51 PM
vagadon vagadon is offline
Junior Member
 
Join Date: Jun 2011
Posts: 2
Default follow up

Thanks so much, that about answers it completely. so of course, I now have more questions.

The number on the labeled chip is 002835.

can i order the alternate digi-pot chips from highly liquid or do i need to go to mfg?

do you recommend a thermal-transfer compound for the mounting of the 7805?

thanks again,
db
Reply With Quote
  #4  
Old 06-21-2011, 06:32 PM
John's Avatar
John John is offline
Moderator
 
Join Date: Jan 2009
Posts: 3,007
Default

Quote:
Originally Posted by vagadon View Post
The number on the labeled chip is 002835.
Ok--your firmware is version 1.2. You can find the firmware manual in the documentation index:

http://forum.highlyliquid.com/showthread.php?t=1130

Quote:
can i order the alternate digi-pot chips from highly liquid or do i need to go to mfg?
If you happen to be placing an order with HL, we can throw a digipot IC or two into your order. Otherwise, you'll get a better price if you just buy them from Mouser or Digikey, etc. Just make sure you're ordering the DIP package rather than the surface-mount.

Quote:
do you recommend a thermal-transfer compound for the mounting of the 7805?
This isn't necessary for the MPA. The current draw is very low and won't cause any heating of the 7805, unless you place a load on the regulated 5V output.

Rev A hardware specs are here:

http://forum.highlyliquid.com/showthread.php?t=1134
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


All times are GMT. The time now is 12:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.