[Swansea Hackspace] arduino starter kit

[Tim Moore]

I would point out that 'shields' fit Uno's that is why I no longer use
Nano's.

A compatible 4 relay shield might be good to have as an 'extra'.

http://www.ebay.co.uk/itm/400624959578

:  )

Tim_1


On 28 August 2014 15:29, Alan Cox <alan at lxorguk.ukuu.org.uk> wrote:

> > > You might want to add a cheap EEPROM, includes a feel for I2C this way
> > > (or SPI).
> > not sure how interesting an EEPROM would be, maybe a cheap SDCARD
>
> I would have thought flash over eeprom
>
> > module, but they tend to be a bit expensive in this context, and also
> > often 3.3v logic.
>
> SD is 3.3v so for Ardweenies you need a level shifter. Works great on
> most of the other platforms (Papilio, PI etc). In SPI mode the buffering
> is unidirectional for each line and not too hard, plus you only need one
> extra line per extra device you put on the same bus (although possibly
> quad 32GB SD card is excessive on an Arduino!)
>
> You can get SD 3.3v boards very very cheap from China (think I paid £5 or
> so a combo SPI and 320x240 3.3v SPI LCD board).
>
> Alan
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