| NURDspace Project | |
|---|---|
 | |
| Participants | Bjornl |
| Skills | |
| Status | |
| Niche | |
| Purpose | |
| Tool | |
| Location | |
| Cost | |
| Tool category | |
{{{Name}}}Property "Tool Name" (as page type) with input value "{{{Name}}}" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. Property "Tool Image" (as page type) with input value "File:{{{Picture}}}" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. {{{Picture}}} {{#if:{{{Tool}}} | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:{{{Tool}}} | [[Tool Cost::{{{Cost}}} | }}
Small sign
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 on the speaker next to the 19" rack and displays messages from IRC users (!wall and !speak). Code is available on github, based on this earlier code.
Large sign
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:
- NEC D8049HC 195 (pre-programmed CPU)
- Motorola SN74LS373N ( http://www.alldatasheet.com/datasheet-pdf/pdf/5714/MOTOROLA/SN74LS373N.html )
- Toshiba TC5517APL (Static RAM, probably where the program is stored)
- unmarked IC, probably an EPROM
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 * DM74LS259N 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
PIN OUT
01 - VCC 02 - VCC 03 - VCC 04 - SN74LS273N PIN 1 (MR) 05 - SN74LS138N PIN 5 (E2) 06 - SN74LS273N PIN 4 (D1) 07 - SN74LS138N PIN 1 (A0) 08 - SN74LS273N PIN 3 (D0) 09 - SN74LS138N PIN 2 (A1) 10 - SN74LS273N PIN 7 (D2) 11 - SN74LS138N PIN 3 (A2) 12 - SN74LS273N PIN 17 (D6) 13 - SN74LS138N PIN 4 (E1) 14 - SN74LS273N PIN 13 (D4) 15 - GND 16 - SN74LS273N PIN 8 (D3) 17 - GND 18 - SN74LS273N PIN 14 (D5) 19 - GND 20 - GND