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

[Ceri Clatworthy]

[image: Inline image 1][image: Inline image 2]


This type of LCD display with backlight off can be vrey low power !!

significantly ledd than a 2" 7 segment LED ??

[image: Inline image 3]    [image: Inline image 4]

does not have to have as meany leds

On Thu, Jan 28, 2016 at 10:16 AM, 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.
>
> Thanks all,
>
> Richard
>
>
> On 28 January 2016 at 09:37, 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
>>
>
>
>
> --
> Kind regards,
>
> Richard
>
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>
>
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