LED banner wall: Difference between revisions

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=== Current status ===
=== Current status ===
Software running on spacenanny in a screen unther the user nanny there is a window called bigledpanel if something goes wrong restart the script in that screen
Software running on spacenanny. In a screen session under the user nanny there is a window called bigledpanel where the main code is running. If something goes wrong restart the script in that screen.


<pre>
<pre>
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==== old ====
==== old ====
* First try https://gist.github.com/zarya/10f47d6b3097643f4016
* First try https://gist.github.com/zarya/10f47d6b3097643f4016
* I starts to work https://gist.github.com/zarya/33fe46dac38b89f84d60
* It starts to work https://gist.github.com/zarya/33fe46dac38b89f84d60
* last current code https://gist.github.com/zarya/24b3b56be5c432334539
* last current code https://gist.github.com/zarya/24b3b56be5c432334539



Revision as of 13:26, 13 August 2014

NURDspace Project
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Participants Bjornl
Skills
Status
Niche
Purpose
Tool
Location
Cost
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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 stored somewhere. Code is available on github, based on this earlier code.

15/12/13

Petraea dragged the sign out to give it a little dusting down to find that a bunch of columns no longer worked(See inset animation) BrokenChip.gif A little digging around identified that the CLK line was broken, so a simple extra wire was fitted to repair this.

Left EditedLEDStripBack.jpg


Working.jpg

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.

Current status

Software running on spacenanny. In a screen session under the user nanny there is a window called bigledpanel where the main code is running. If something goes wrong restart the script in that screen.

cd ~/bigledpanel/server
while true; do python general.py -p /dev/ttyACM0 -s 9600 --mpdhost slab ; sleep 1 ; done

Source code

old

First images

Schema's / Electronics

Arduino Pin setup

PORT_D
 0 (PD0) - UART RX
 1 (PD1) - D5
 2 (PD6) - D3 A0
 3 (PD5) - D4 A1
 4 (PD4) - D6 A2
 5 (PD3) - D2
 6 (PD2) - D0
 7 (PD1) - D1
PORT_B
 8  (PB0) - MR
 9  (PB1) - E1
 10 (PB3) - E2
PORT_C
 14 (A0,PC0) - A0
 15 (A1,PC1) - A1
 16 (A2,PC2) - A2

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

Ledboard groot schema.png Ledboard Chip placement.png

Old info

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