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

[Ceri Clatworthy]

This is another zero power display. ..
Emmanently hackable

http://m.ebay.co.uk/itm/331525033859

Flip clock.

Before any one complaints about my zero power statement.
As E paper. . Only concumes power on change.

Ceri
On 28 Jan 2016 19:38, "Richard Morgan" <richard.morgan at avocation.co.uk>
wrote:

> Fantastic Ceri - Lego is about my level of 'maker-fu' skills :-)
>
> Terrific suggestions and advice from all, thanks Justin, Alan, Nathan for
> the input and taking the time.
>
> I think I've got a better idea of what I'm after for this project now.
> Will go look at components and come back to the list for thoughts before I
> start the project.
>
> I love Swansea Hackspace - where else can you get such support, advice,
> links, lessons learned and guidance, from specialists and mickey-taking all
> within hours of asking!
>
> Cheers all
>
> On 28 January 2016 at 19:15, Richard Morgan <
> richard.morgan at avocation.co.uk> wrote:
>
>> Cheers Justin,
>> So if I wanted three of these for my 3 digit display:
>>
>> http://uk.farnell.com/kingbright/sa40-19sekwa/display-4-0-cmn-anode-orange/dp/2080054
>>
>> Could I still use the LED Display Driver you suggested?
>>
>> https://www.maximintegrated.com/en/products/power/display-power-control/MAX7219.html
>>
>>
>> You mentioned a 'simple SPI interface' - I don't know what that means and
>> didn't want to say on the main list.
>>
>> In terms of other components - would I just need an Arduino Uno(?) or a
>> Raspberry Pi to programme this and run it?
>>
>> Cheers,
>>
>> Richard
>>
>>
>>
>> On 28 January 2016 at 11:31, Justin Mitchell <
>> justin at swansea.hackspace.org.uk> wrote:
>>
>>> On Thu, 2016-01-28 at 11:08 +0000, Nathan Hackett wrote:
>>> > From memory I got about 18 hours from 3 AA batteries, with 3x 2.3inch
>>> > high led digits. That was at max brightness though, could get a lot
>>> > more running them dimmer. Or pick up some £10 10000mah phone charger
>>> > packs, that would help. The other downside of larger displays is they
>>> > can have several leds in series per segment, which results in a higher
>>> > voltage-drop than the arduino can cope with on its own. Things get
>>> > complicated. LCD might indeed be more suitable. :)
>>>
>>> A chip like the MAX7219 will drive upto 8x 7-segment digits, do alot of
>>> the hard work for you, and present a simple SPI interface to the
>>> arduino/RPi
>>>
>>> http://playground.arduino.cc/Main/MAX72XXHardware
>>>
>>>
>>> https://www.maximintegrated.com/en/products/power/display-power-control/MAX7219.html
>>>
>>> Also, how BIG did you envisage this display being ?
>>>
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>
>>
>>
>> --
>> Kind regards,
>>
>> Richard
>>
>
>
>
> --
> Kind regards,
>
> Richard
>
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>
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