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

[Nathan Hackett]

Hey so I have a mostly finished project that could definitely be
re-purposed for this. Has those rtc modules, three digits per unit.
Arduino, runs on 3x AA batteries each. Speakers built in too. If you're
around Monday evening I can bring them in to take a look at. As mentioned
the code would be pretty simple. Pics here -

http://imgur.com/a/uSNnN

On Thu, Jan 28, 2016 at 9:37 AM, Alan Cox <alan at lxorguk.ukuu.org.uk> wrote:

> > Ideally it would be something that I could run off a re-chargeable
> battery
> > pack for portability but plugging in would be okay.
> >
> > Would this be a Raspberry Pi project or would you recommend an Arduino?
> >
> > All suggestions very gratefully received...
>
> I would think pretty much any tiny microcontroller can do it. SPI rtc,
> SPI led driver and that's about it. The program ought to be tiny and the
> data file you need is 366 bits. Even the lazy man's version is going to be
> under 1KB (table with the correct number to show for each 'day of the
> year').
>
> A PI would be able to run ntp, scrape the government web sites and adjust
> if they change the official bank holiday list but does draw somewhat
> higher power.
>
> Alan
>
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