[OpenTRV-dev] I2C expansion connector round 3

[Damon Hart-Davis]

Hmm,  I can by Vero board with cuts between adjacent holes, which is how I made my RPi shield.

This one at Maplin I think though the pic is not very good: http://www.maplin.co.uk/p/tripad-board-jp52g

A split arrangement is going to increase board space and make a stacking header more complex/expensive, isn’t it?

We’re going to have to decide the physical form RealSoonNow(TM), so if you can point me to working examples of what you propose then I’m keen to see them.

Rgds

Damon



On 8 Sep 2014, at 22:04, Adrian Godwin <EMAIL ADDRESS HIDDEN> wrote:

> Could you consider 2 rows of single pin headers instead of 2-pin? It's much easier with veroboard (no cuts between 0.1" holes) and also self-supports a board better. Split sets like arduino but NOT with silly spacing can help polarise, especially if the power pins fall in a hole when reversed.
> 
> On 8 Sep 2014 19:36, "Damon Hart-Davis" <EMAIL ADDRESS HIDDEN> wrote:
> They are all good questions, and are helping to keep me thinking straight.  Keep asking!
> 
> Rgds
> 
> Damon
> 
> 
> On 8 Sep 2014, at 19:31, Richard Chilton <EMAIL ADDRESS HIDDEN> wrote:
> 
>> Thanks, with the new context it makes more sense. It could be a long game, but hopefully your Energy Return On Energy Invested in answering my stupid questions will exceed 1.0 at some future point in time!
>> 
>> 
>> On 8 Sep 2014, at 18:45, Damon Hart-Davis <EMAIL ADDRESS HIDDEN> wrote:
>> 
>>> Hi
>>> 
>>> We need something NOW for the prod eng / consumer board to let us program in place and we also have a secret hush-hush IoT thing going on where we may want to stuff as-yet-unknown sensors in easily.
>>> 
>>> I also want to make the R&D/hobbyiest boards as easy to extend and connect as possible, eg with a single bridge board to the RPi, long overdue.
>>> 
>>> And I don’t have time to do it perfectly, you know the story.  I’ll have cheese with my whine, thank you!  %-P
>>> 
>>> So, yes, compromise.
>>> 
>>> The prod eng guy had my connector in his schematic withing about 5 minutes of me sending it over, and I didn’t want to hold back our discussions today at all as I’m back at the day job for all or most of this week!
>>> 
>>> Project roadmap?  What a good idea; I’ve heard of those!  (Today was meant to be partly planning time, but, well…)
>>> 
>>> Rgds
>>> 
>>> Damon
>> 
>> 
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