DOT it yourself !

[Persecutor]

on a abordé le sujet avec Fred en revenant du BGS

sur les fofo américains il commencent a se demander comment pare son propre dot à led  :happyjump:

http://www.vpforums.org/index.php?showtopic=19973

http://longhornengineer.com/2011/08/27/128x32-led-dmd-pcb-done/

ou plus brutal http://pinside.com/pinball/forum/topic/building-my-own-pinball-machine-a-few-qs#post-175465  :waou:


http://www.youtube.com/embed/mWz7RUtxxog

:ic:

[demether]

dans un autre registre, la mode actuelle en pincabb c'est justement d'avoir un vrai affichage dot, d'ailleurs  ^-

[Persecutor]

oui enfin a $279.95 le display orange + 52.28$ le contrôleur + le port (voire les taxes)

je me demande si je peux pas passer qq heures a souder 

LEDDMD 128x32 Complete

http://longhornengineer.com/pinball/32x128-leddmd-v1-0/

[demether]

c'est des bidules pour bricolage arduino, nan ? Ca vaut le coup financierement ?

[Persecutor]

4096 led c'est un peu raide  :stupidking:

faut utiliser des 64 segments de 8x8 


C'est le DMD Vishay LED-128G032 qui remplace les dot a tube APD-128G032 que l'on trouve dans les boutiques de flipp www.vishay.com

Note pour plus tard  :
driver dalle ? NEC D16306GF - 9709K7  (:: mis pas sur ...
taille 32.385 cm (12.75 in) x 80 mm (3.15 in) épaisseur 1.778 cm ?

DISPLAY, LCD GRAPHIC, 128 X 32 DOTS
Backlighting Color: Red
Pixel Size (H x W): 1.6mm x 0.8mm
Viewing Area (H x W): 80.01mm x 323.8mm
Supply Voltage: 5V

http://www.vishay.com/docs/37088/l128g32b.pdf

[Persecutor]

Source : http://pinwiki.org/wiki/Dot_Matrix_Display

Dot Matrix Display

A Dot Matrix Display (or DMD) is pinball display technology that became prevalent from 1990 onward. While previous display technologies formed numbers and letters with discrete segments (or even reels), a dot matrix display is comprised of many dots which can be lit to form not only different numbers and letters, but also different fonts, as well as artwork and animation.
Contents
[hide]

    1 Creating DMD Animations
    2 Technical Information
        2.1 Resolution
        2.2 Control Interface
        2.3 Manufacturing
    3 External links

Creating DMD Animations

DMD artists (also known as "dot guys") develop animation sequences for games one frame at a time. Frames must be created by hand, as simply scaling and converting a photograph (or a sequence of frames from a movie) does not yield good results. In an interview on TOPcast #28, dot artist Adam Rhine said that he has used Electronic Arts' Deluxe Animation (a program that was last updated in 1990) for every dot matrix project he has done, including recent Stern releases, as it is the only application suitable for the needs of a dot matrix artist.

Once the frames are ready, the artist would then send them to the programmer on the project, who could then display them on a DMD. It was not until much later that Williams built a "dot box" which would display frames sent to it over a parallel printer port, drastically improving the artist's ability to proof his work.
Technical Information
Resolution

The most commonly used dot matrix display resolution is 128 columns by 32 rows (128x32). Other dot matrix sizes have been used, such as 128x16 (on some Data East games), 192x64 (Data East and Sega), as well as 256x64 (for Capcom's Flipper Football). Each dot has only an 'on' and 'off' setting, so grayscale levels must be simulated by cycling dots on and off. According to dot guy Adam Rhine, Williams used four levels of brightness: 0%, 75%, 90%, and 100% on.
Control Interface

DMDs are generally controlled by a specialized controller board over six lines/pins:

    Display Enable
    Row Data
    Row Clock
    Column Latch
    Column Clock
    Column Data

A DMD, like other I/O systems in a pinball machine, operates as a matrix. In the case of a DMD, only one row is on at any one time. This means that the DMD must be updated continuously in order to display an image. For this reason, manufacturers generally recommend updating the entire frame at a minimum speed of 70Hz in order to avoid flickering. In order to display a row of dots, those dots must be fed into the DMD one dot at a time (using Column Clock and Column Data), and then stored (using Column Latch). Once the row of data is stored, the DMD is told which row to display (using the Row Data and Row Clock lines). A Display Enable line is also used in order to turn the entire display on or off. This can be used to turn off the display in the event of a failure, or (more commonly) to prevent blurring as the active row is updated.

The clock and data lines all feed to a series of serial-in parallel-out shift registers. As such, in order to control which row is active, a 1 (or high) must only be fed into Row Data once per frame. Pulsing Row Clock with Row Data set to 0 (or low) will advance (shift) the 1 down the rows while reading in 0's after it.

The order of operations for updating a full row of a DMD is as follows: (assumes a 128x32 resolution)

    Clock in a full row of 128 bits using the column data and clock lines. Hardware SPI (serial peripheral interface)[1] is best for this.
    Latch in the row of data bits by pulsing the Column Latch high.
    Disable the display.
    If this is the first row, set Row Data to high.
    Pulse the Row Clock low to advance the row data.
    Enable the display.

To update a full frame, the above sequence must be performed 32 times.
Manufacturing

Manufacturers include Babcock (under the Plasmadot trademark), Cherry Electronics, and Vishay-Dale. While these displays were originally manufactured using gas plasma technology, LED DMDs are becoming available from companies such as PinLED. In order to comply with RoHS[2], Stern is using LED displays in its export games.

[demether]

C'est le genre de choses que j'adapterai peut etre un jour sur le flipper virtuel pour rajouter un poil de réalisme (qui sert pas mal ces dernieres semaines et ça c'est cool...faut que j'en fasse autant pour la borne)

ce qui est rigolo sur le flip virtuel, c'est que plus on joue, plus c'est réaliste...ou plutot, plus on joue, plus on trouve "naturel" de jouer comme ça..