Difference between revisions of "LED banner wall"

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* unmarked IC, probably an EPROM
 
* unmarked IC, probably an EPROM
 
The Toshiba and the unmarked IC are in a socket, the other two are soldered to the PCB.
 
The Toshiba and the unmarked IC are in a socket, the other two are soldered to the PCB.
 +
 +
The LED panel ( http://www.flickr.com/photos/bjornlammers/8425075284/in/photostream ) contains:
 +
* 6 * SN74LS273N ( http://www.alldatasheet.com/datasheet-pdf/pdf/5696/MOTOROLA/SN74LS273N.html )
 +
* 6 * uA9668PC ( http://www.alldatasheet.com/datasheet-pdf/pdf/102338/FAIRCHILD/UA9668PC.html )
 +
* 1 * SN74LS138N Decoder/demultiplexer ( http://www.alldatasheet.com/datasheet-pdf/pdf/5654/MOTOROLA/SN74LS138N.html )
 +
* 2 * SN74LS138N  8-Bit Addressable Latches ( http://www.alldatasheet.com/datasheet-pdf/pdf/51060/FAIRCHILD/DM74LS259N.html )
 +
* 4 * unmarked IC
  
 
See also this tech-archive thread: http://sci.tech-archive.net/Archive/sci.electronics.repair/2012-06/msg00302.html
 
See also this tech-archive thread: http://sci.tech-archive.net/Archive/sci.electronics.repair/2012-06/msg00302.html

Revision as of 21:31, 28 January 2013

NURDspace Project
link=File:{{{Name}}}.jpg
Participants Bjornl, Zarya
Skills
Status
Niche
Purpose
Tool
Location
Cost
Tool category
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{{{Picture}}} {{#if:{{{Tool}}} | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:{{{Tool}}} | [[Tool Cost::{{{Cost}}} | }}

Yotson modified a small LED banner sign to be controlled by an Arduino. After hooking it up to the Dockstar and reprogramming SpaceBot it is now located in the 19" rack and displays messages from IRC users.

DeDaan brought in a larger sign. We plan on modifying this as well to have a second banner; if this is working, the smaller one will probably be used to indicate space state to the outside world from behind a window above the front door.

The larger sign contains a separate control unit, programmed using a separate keyboard with a DB-9 like plug. It is attached to a PCB containing the LEDs with a 20 pin flatcable.

The control unit ( http://www.flickr.com/photos/bjornlammers/8425066292/in/photostream ) contains the following ICs:

The Toshiba and the unmarked IC are in a socket, the other two are soldered to the PCB.

The LED panel ( http://www.flickr.com/photos/bjornlammers/8425075284/in/photostream ) contains:

See also this tech-archive thread: http://sci.tech-archive.net/Archive/sci.electronics.repair/2012-06/msg00302.html

 
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