[Swansea Hackspace] Daily Countdown (but working days not calendar)

[Ceri Clatworthy]

https://www.youtube.com/watch?v=H9ZRyT9gJa0

In this each succsesive segment gets advanced in a binary pattern

or this
https://youtu.be/SdmDb8ozcXc

On Thu, Jan 28, 2016 at 1:05 PM, Alan Cox <alan at lxorguk.ukuu.org.uk> wrote:

> On Thu, 28 Jan 2016 10:16:30 +0000
> Richard Morgan <richard.morgan at avocation.co.uk> wrote:
>
> > Thanks all.
> >
> > My assumption would be that the bank-hols won't change the much so no
> need
> > for internet access and likely RTC module for timekeeping.
> >
> > In terms of power-draw - thinking about it the LED display being large
> > would I guess need more than battery power for a prolonged period (could
> I
> > set it to power down the lights at set times of day/week maybe). I think
> > Raspberry Pi might be overkill but I'm no expert.
> >
> > Not set on what the display is so open to suggestions/guidance - I am a
> > newbie so something straightforward to interface would be helpful for me.
>
> For power efficiency your optimum would probably be e-paper but that
> might be a bit pricy. An epaper display and a microcontroller ought to
> run for years as it only needs to power on once a day to change the
> display then turn itself off entirely.
>
> A mechanical display silly as it sounds might also be incredibly power
> efficient for one change a day !
>
> Alan
>
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