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by pygmy_giant
Wed Apr 11, 2012 9:35 am
Forum: Other projects
Topic: Opto-isolator
Replies: 10
Views: 3788

Re: Opto-isolator

Interesting - I found this:

http://www.electronicsweekly.c.....5Mbits.htm

Seems bi-directional opto-coupling is possible...

... will continue to investigate the cost and practical feasibility ...
by pygmy_giant
Sat Apr 07, 2012 3:44 pm
Forum: Other projects
Topic: Opto-isolator
Replies: 10
Views: 3788

Re: Opto-isolator

<t>Thanks - so much useful info!<br/> <br/> I didn't realise that each pin could be programmed as either an input or an output...<br/> <br/> ...tell me if this is crazy but could one somehow safely connect 2 opto-couplers to one pin in parallell but in oposite directions to make a bi-directional cou...
by pygmy_giant
Sat Apr 07, 2012 1:56 pm
Forum: Other projects
Topic: Opto-isolator
Replies: 10
Views: 3788

Re: Opto-isolator

<t>Thanks you two – that"s useful information – I"ll start saving up.<br/> <br/> First I will just be flashing led"s on and off to test my programming skills (or "scripting" as the kids call it). Then I anticipate switching some motors and reversing their direction via dpdt relays for a robot buggy....
by pygmy_giant
Fri Apr 06, 2012 8:09 pm
Forum: Other projects
Topic: Pi-finity! A Network-based MMORP Game Being Built by and for Only R-Pi Users
Replies: 36
Views: 9331

Re: Pi-finity! A Network-based MMORP Game Being Built by and for Only R-Pi Users

<t>Ok - I have an allergy to cliques which is why I'm attracted to the RPI as its ethos seems to be one of embracing the masses through affordable computing and free unix distros, so it feels counterintuitive to promote the RPI through exclusivity.<br/> <br/> Why not just have a MMORP compatible wit...
by pygmy_giant
Fri Apr 06, 2012 7:15 pm
Forum: Other projects
Topic: Opto-isolator
Replies: 10
Views: 3788

Re: Opto-isolator

As much as £1?
by pygmy_giant
Fri Apr 06, 2012 12:08 pm
Forum: Other projects
Topic: Opto-isolator
Replies: 10
Views: 3788

Re: Opto-isolator

<t>Hi - I would like to use my RPI for a robotics project and am keen to isolate it from secondary circuits to avoid catastrophy. I am also on a budget and would like to acheive this via an opto-isolator IC and mini-breadboard. Rather than buying a bulky 3rd party io board with functionality I don't...
by pygmy_giant
Fri Apr 06, 2012 11:32 am
Forum: Other projects
Topic: Fully isolated GPIO/I2C and RTC expansion board
Replies: 24
Views: 9548

Re: Fully isolated GPIO/I2C and RTC expansion board

please include mounting holes
by pygmy_giant
Fri Apr 06, 2012 11:09 am
Forum: Other projects
Topic: Berry Box - The Transparent Case
Replies: 105
Views: 40457

Re: Berry Box - The Transparent Case

Interesting - could/is there holes to line up with meccano type construction kits?
by pygmy_giant
Wed Apr 04, 2012 11:39 am
Forum: Other projects
Topic: Berry Box - The Transparent Case
Replies: 105
Views: 40457

Re: Berry Box - The Transparent Case

<t>Would industrial velco be useful in a car?<br/> <br/> I notice that there are alot of in-car entertainment screens available – is that where you are headed davesedar?<br/> <br/> Myself, I got 2 breadboards from china in the post today – about £1 each – they are Pi sized and self adhesive. The fir...
by pygmy_giant
Wed Apr 04, 2012 10:59 am
Forum: General discussion
Topic: Potential power source
Replies: 83
Views: 13683

Re: Potential power source

you can get multimeters from ebay quite cheaply...
by pygmy_giant
Tue Apr 03, 2012 9:15 pm
Forum: General discussion
Topic: clips
Replies: 7
Views: 1537

Re: clips

<t>Nice to hear that work around is effective. I have seen some self-adhesive holes in the screw-fix catalogue that would work if it weren't for the hidden layers in the board. Come to think of it I might also have seen something like Gert describes (vertical clip with screw hole) in said catalogue ...
by pygmy_giant
Tue Apr 03, 2012 1:23 pm
Forum: General discussion
Topic: holes
Replies: 41
Views: 4116

Re: holes

I got it – balance the board on the sholders of a few stand-offs dotted around the edge and then screw down on top – problem solved.
by pygmy_giant
Tue Apr 03, 2012 1:12 pm
Forum: General discussion
Topic: Potential power source
Replies: 83
Views: 13683

Re: Potential power source

your avatar pic reminds me of the mad nuclear scientist in th 80's film Repo Man.
by pygmy_giant
Tue Apr 03, 2012 12:54 pm
Forum: General discussion
Topic: clips
Replies: 7
Views: 1537

Re: clips

Think I might ballance it on the sholders of some stand-offs and then screw down on top...
by pygmy_giant
Tue Apr 03, 2012 11:37 am
Forum: General discussion
Topic: clips
Replies: 7
Views: 1537

Re: clips

Hi - does anyone know of any currently available, cheap, simple, effective off-the-shelf solutions that could clip onto the edge of the Pi board and then be fastened to a chassis?
by pygmy_giant
Tue Apr 03, 2012 10:58 am
Forum: General discussion
Topic: holes
Replies: 41
Views: 4116

Re: holes

<t>You have more experience than me and maybe I'm being over-cautious. I did notice that some enterprising chap has designed a sort of clippy cradle that sticks on lego bricks or can be screwed down. I would prefer this to a full case so I can plug stuff onto the header pins easily, but again, it se...
by pygmy_giant
Tue Apr 03, 2012 10:36 am
Forum: General discussion
Topic: holes
Replies: 41
Views: 4116

Re: holes

...and what will brace the board when you plug and unplug the cables? Blutack? You may find yourself taking it out the box and praying that you don't knock off a component in the process. I think the Pi Foundation have missed a trick as no holes could deter some potential customers.
by pygmy_giant
Tue Apr 03, 2012 10:17 am
Forum: General discussion
Topic: holes
Replies: 41
Views: 4116

Re: holes

You can mock the silent majority for their hole yernings, but the board needs to be held securely when periferals are plugged-in and un-plugged. For hobbyists like me without a 3d printer and extensive cad experience, holes are useful.
by pygmy_giant
Tue Apr 03, 2012 10:11 am
Forum: General discussion
Topic: holes
Replies: 41
Views: 4116

Re: holes

holey moley!
by pygmy_giant
Tue Apr 03, 2012 9:56 am
Forum: General discussion
Topic: holes
Replies: 41
Views: 4116

Re: holes

What is this 'edge clip' of which you speak? The edges look chock-a-block too! I still think holes would be a good feature to include in the model C.
by pygmy_giant
Tue Apr 03, 2012 9:51 am
Forum: General discussion
Topic: Potential power source
Replies: 83
Views: 13683

Re: Potential power source

<t>Hmmm.... I know the feeling - thats what I'm like at the end of the working day. If my lipo's don't cut it I'll use them to power secondary circuits. I'm not sure any of us can be certain of the 700mA figure until its been tried and tested in different contexts. Would I be right in interprating i...
by pygmy_giant
Mon Apr 02, 2012 10:49 pm
Forum: Other projects
Topic: Berry Box - The Transparent Case
Replies: 105
Views: 40457

Re: Berry Box - The Transparent Case

Hey - what happens if you stand on it (with one leg balancing) ? - that would impress me - can it support one man's weight? What if you drop it from shoulder height - could it absorb shock and protect the Pi? Not so daft specs if you intend it to be used for robot projects.
by pygmy_giant
Mon Apr 02, 2012 10:38 pm
Forum: Other projects
Topic: Berry Box - The Transparent Case
Replies: 105
Views: 40457

Re: Berry Box - The Transparent Case

<t>Like the industrial look - I anticipate dremmeling out a project box and so can see the attraction of a ready-made solution for around £5. What would really float my boat would be a case with a mini-breadboard on top and battery pack underneath that is strong enough to withstand moderate abuse. I...
by pygmy_giant
Mon Apr 02, 2012 10:20 pm
Forum: Off topic discussion
Topic: Name your next model of the Raspberry pi!
Replies: 22
Views: 7099

Re: Name your next model of the Raspberry pi!

Raspberry Tart?

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