[tech] [committee] Wire wrap and other prototyping

[Harry]

Hi Bob, Sam et al

I like the idea of a weekend (afternoons since I cycle in the morning,
frequently both days).

Sam, that particular board has a lot of small parts so I think it would be
useful for adding some analog or interface glue onto something built around
the embed board. I have an almost complete one of the boards that I am about
to consume so I can bring down the results of that to show what I wanted to
test. Wire-wrap will cost a bit more than solder, sockets, and wire (and you
can get more circuit onto an area than using vero strip board) but the two
advantages are that you can play with the circuit like using a breadboard but
when you stop, the final circuit is pretty robust and ready to go in a box if
you intent to use it more permanently.

If you want to use larger SMD parts then we'd have to buy some individual
adaptor boards. Have a look at the other general purpose boards (like TSSOP
etc) on the Bellin site.

Is there a UCC project needed based around an embed or arduino that needs
doing that has to have some analog (op-amp buffers for ADC or DACs etc), power
supply, interface (RJ45 with magnetics) that we could build up to demonstrate
wire-wrap prototypes ? If you can think of an example we could meet, design,
and order a few parts, then meet again to assemble the hardware.

Harry

On 26/03/12 19:42, Bob Adamson wrote:
> I'm unsure why this was only on committee so I'm cc-ing to tech...
> 
> UCC does indeed have a wire wrap tool, though it's a simple hand one
> like this: http://www.aeroconsystems.com/electronics/wire_wrap_tool.jpg
> Having never had all the equipment to do wire wrapping, I can't vouch
> for its effectiveness. I think the one we had many years ago got stolen
> with our toolbox in 2009.
> 
> Any chance this talk could happen on a weekend or as part of a sunday
> hackathon? I'm pretty keen to attend and/or organise it, but weeknights
> are a pita for me.
> 
> Bob
> 
> -----Original Message----- From: Harry
> Sent: Monday, March 26, 2012 1:54 PM
> Cc: committee at ucc.asn.au
> Subject: Re: [committee] Wire wrap and other prototyping
> 
> Hi Sam (etc)
> 
> Can do. What date ? A calamity is that the little adaptor boards I have
> been
> using (SO8, SOT23, etc to DIP8) are discontinued from SoanarPlus. I'm just
> finding out now what is available.
> 
> Manufacturer is Bellin Dynamic Systems:
> http://www.beldynsys.com/p513.htm
> 
> Ok, Mouser still has them:
> http://au.mouser.com/ProductDetail/Bellin-Dynamic-Systems/B513/?qs=Gk9gycAtN1rmJArzNw%252b65w%3D%3D
> 
> 
> If you let me know the stepper driver chip package you were using (was it
> TSSOP28 ?) I can get one of those from you and set it up on an adaptor
> board
> (if available) to show a different approach rather than soldering to the
> SMD legs.
> 
> All the best
> Harry
> 
> On 26/03/12 13:11, Sam Moore wrote:
>> Hi Harry,
>>
>> I think this is a great idea. I know that my own prototyping methods are
>> fairly primitive (I solder everything... upside down). I've included
>> committee in this email. We want to try doing more tech talks /
>> workshops, so maybe we could organise some people who are interested to
>> present for this.
>>
>> I can bring my old robots, but I am not really very knowledgable, and
>> they are hardly good examples of how things should be done.
>>
>> Anyway, the first "tech talk" is on this Thursday. Perhaps we could
>> schedule this as the second?
>>
>> Thanks,
>> Sam
>>
>>
>>
>>
>> On Mon, 26 Mar 2012, Harry McNally wrote:
>>
>>> Hi Sam
>>>
>>> I was speaking to James Bromburger (old guard UCCan if you don't know
>>> him) the 
>>> other night about general move towards -using- tech rather than
>>> -creating-
>>> tech with thoughts about UCC activities.
>>>
>>> I said hardware construction was pretty limited although recent work
>>> on the
>>> door lock and Coke refurbishment shows people are still doing it.
>>>
>>> I wondered if it was worth reviewing work on robots by doing a
>>> session on
>>> prototyping techniques for reliability and so on. If anyone has some
>>> built
>>> gear that they could bring along to discuss advantages and pitfalls of
>>> their
>>> construction and possible alternatives. I've used wire-wrap other
>>> prototyping
>>> boards (and still do for some things I want to adjust and play with)
>>> but there
>>> are other possible construction tricks as well. Let me know if you
>>> think a
>>> show and tell is worthwhile; maybe stand alone or on an afternoon of a
>>> ProgComp workshop.
>>>
>>> Just an idea to consider anyway and something that I think I can
>>> contribute to
>>> UCC.
>>>
>>> All the best
>>> Harry
>>>
>>
>