[Swansea Hackspace] Flip dot display group project...

[Justin Mitchell]

On Wed, 2018-02-14 at 20:09 +0000, Nathan Hackett wrote:
> Not sure what you mean by pixel drivers Justin, there are certainly
> chips on the panels themselves as listed on the google doc, and the
> driver board itself is shown in the pdf manual as "7090 Processor
> Board" page 17.

>From the diagrams you already included the chips on the display board
deal with the multiplexing and applying the higher voltages to
driver/flip the individual bits, you just need to supply the board with
logic levels to select and flip individual pixels.


> http://www.destination-blinds.co.uk/HanoverDisplays/Flip_Dot_Manual_v
> B.pdf
> 
> I'll have a look at what data it's sending on Monday. Would be great
> to use an esp32, the dual processor would potentially allow for a web
> based ui without effecting the refresh rate. :-)

i doubt you need the expense of an esp32, the 8266 is plenty fast
enough at 80MHz.

should also have enough ram to hold in internal bitmap representation
of the grid and allow optimised updates that only flip the individual
pixels that have actually changed,  which would speed up refreshes in
animations,


> On 14 Feb 2018 10:33, "Justin Mitchell" <justin at swansea.hackspace.org
> .uk> wrote:
> > On Wed, 2018-02-14 at 01:36 +0000, Nathan Hackett wrote:
> > > If anyone is interested in the new group project, I've put a page
> > > on the website-https://swansea.hackspace.org.uk/Main/Projects
> > > 
> > > Most of this is taken from what Peter managed to find out (in one
> > > day!). He has made a google docs page to pool our information-
> > > 
> > > https://docs.google.com/document/d/e/2PACX-1vR_SWq8sPydsWIQ832bTG
> > > QPMFefCNGMGWPGvfA5CLWcXVjtyCF8e5IOs0H8OKQGIg1GNKEIMmheXh31/pub
> > > 
> > > If anyone wants the edit link for that, just email me. The more
> > > help we can get the better, need programming skills
> > > (microcontroller plus higher level network/ui stuff), case
> > > making, reverse engineering, soldering, possibly pcb making...
> > > 
> > > I have 7 panels in total, but only two controller boards that can
> > > each run up to three panels together in series. Ideally we would
> > > like to replicate enough of the "brains" of the system to
> > > construct up to 7 separate units. I am committed to donating one
> > > panel free to the hackspace, and possibly a second one at cost
> > > (£30), if it's necessary for the type of display we want to
> > > build.
> > 
> > If i understand this correctly, the pixel drivers are built into
> > the display board, and all we need is a microcontroller to send it
> > the appropriate bit stream ?
> > 
> > In which case we may be able to use an ESP board, eg the wemos,
> > plus some level convertors, and make a wifi enabled control system
> > for it
> > _______________________________________________
> > 
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> > 
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> > 
> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> > 
> > 
> 
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