Editing Big LED Screen

Jump to: navigation, search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision Your text
Line 52: Line 52:
  
 
Per Josh, the grounds do not need to be connected for now.
 
Per Josh, the grounds do not need to be connected for now.
 +
 +
If anyone can make additional cables and pcb-mountable headers show up that are compatible with the daughterboard cables, that would be useful.
  
 
The serial is daisy chained together.  There are two sets of two daughterboards (four daughterboards total) with 3 shift registers on each daughterboard.  So, each chain of shift registers includes 6 shift registers for a total of 192 bits per chain.
 
The serial is daisy chained together.  There are two sets of two daughterboards (four daughterboards total) with 3 shift registers on each daughterboard.  So, each chain of shift registers includes 6 shift registers for a total of 192 bits per chain.
 
* The 10-pin ports between the daughterboards (J3 and J2) are wired differently.  J3 is:
 
  1 -
 
  2 -
 
  3 -
 
  4 -
 
  5 - ground
 
  6 -
 
  7 - clock
 
  8 -
 
  9 - serial out (j2) / serial in (j3)
 
  10 -
 
  
 
(The existing logic shifts out 200 bits instead of 192; we don't know why).
 
(The existing logic shifts out 200 bits instead of 192; we don't know why).

Please note that all contributions to Noisebridge are considered to be released under the Creative Commons Attribution-NonCommercial-ShareAlike (see Noisebridge:Copyrights for details). If you do not want your writing to be edited mercilessly and redistributed at will, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. Do not submit copyrighted work without permission!

To protect the wiki against automated edit spam, we kindly ask you to solve the following CAPTCHA:

Cancel Editing help (opens in new window)