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31  Using Arduino / LEDs and Multiplexing / Re: Crosspoint Switch on: September 18, 2012, 04:31:37 am
If I'm reading right on the datasheet you attached for the CD405(x) series, the max voltage to pass through a pin is 15vdc, but I don't see anything about ac. And it looks like the min voltage it can handle is 0v, to the voltage supplied to it. I'd have to run it directly off 9v, and command it with 5v from the arduino, for it to handle the 9v dc power, but what would I do about the ac signal?
You need to think about biasing (i.e. giving it a DC V level to sit on top of) the AC signal if you want to pass the full AC signal (positive and negative cycle) through the 4051 working on a +9V single supply rail.
32  Topics / Robotics / Re: Arduino telescope control on: September 18, 2012, 04:15:12 am
Can you post a wiring diagram/schematic?
33  Topics / Robotics / Re: Arduino telescope control on: September 17, 2012, 07:13:03 am
Great project
34  Community / Bar Sport / Re: L.E.D. Zeppelin on: September 17, 2012, 07:08:56 am
 smiley-lol
35  Community / Products and Services / Re: Coming soon - book "Arduino Workshop" on: September 13, 2012, 09:30:44 am
@John, Good luck with your book and thanks for your web tutorials, I've found them very useful
36  General Category / General Discussion / Re: ARM-based Arduino Due - where?? on: September 11, 2012, 04:51:39 am
With the number of low cost ARMs coming out, I suspect they've lost the momentum, and by the time Due finally comes out, it may be a case of too little too late.  Lets see, of just the ARM projects I know of:

  • Raspbery PI, two models, $25/$35, and now you can order as many as you want, runs Linux;
  • Teensy 3.0, kickstarter project that ends in 7 days (already at 800% funding), models start at $22, uses modified Arduino s/w;
  • Galgo, kickstarter project that ends in 17 days (not yet 100% funded), models start at $19, has builtin debugger, and its own development environment;
  • Mbed, two models at $45/59, uses a development environment based in the cloud
  • Beagleboard/beaglebone, $89/$149, runs Linux

There are the Olimex as well and Cutieboard
37  Development / Other Hardware Development / Re: Teensy 3.0 on: September 05, 2012, 04:28:38 am
Cool a Cortex-M4 stamp
38  Using Arduino / Sensors / Re: Underwater Position Sensing Question on: September 02, 2012, 12:15:32 pm
Its not cheap, in fact its very expensive but we sometimes use USBL for tracking ROV's subsea, more details here:

http://en.wikipedia.org/wiki/Ultra-short_baseline

In theory its just a subsea acoustic transceiver and transponder beacon so a homemade one could be made to operate over smaller distance the scuba diver will operate in.
39  Community / Workshops and Events / Workshop Sat 25 August @ Newcastle Maker Space on: August 22, 2012, 05:18:27 pm
Maker Space @ Newcastle are having another of our regular Weekend Workshop's on Saturday 25th August. It's free !!

http://www.makerspace.org.uk/


So bring along your cool stuff, Arduino's, Raspberry Pi's, PicAxe's, retro computers etc., you want to build, learn, play with or just show off.

or you can just pop in to say Hi.

Time: 10.30 to 5.00
40  Development / Other Hardware Development / Re: Found a place for cheap pcb manufacturing on: August 15, 2012, 07:37:14 am
From what I've seen, Iteadstudio and seeedstudio are offering the same services (except for 4-layer with seeedstudio) for the same prices--wonder if they're the same folks. 
Iteadstudio and Seeedstudio are different companies but for their PCB services they both use the same PCB company, which I guess is why they offer similar prices and services.
41  Community / Workshops and Events / Re: Any workshops, trainning, courses in UK? on: July 26, 2012, 04:31:37 am
Have you tried your local Hackerspace or Maker Space. Manchester has a couple of good hackerspaces.

At our Newcastle Maker Space we have a regular Weekend Workshop once a month and a  evening open session twice a month. Anyone can pop along during these and get their hands on a Arduino and play. We do the same for the Raspberry Pi and 3D Printing.
42  Community / Workshops and Events / Workshop Saturday 28th July: Newcastle Maker Space on: July 25, 2012, 04:35:07 am
Summer feels like it's finally here so it's time for another Arduino Workshop :-)

Maker Space @ Newcastle are having another of our regular Weekend Workshop's on Saturday 28th July. It's free !!

So bring along your cool stuff, Arduinos, Raspberry Pi's, PicAxe's, retro computers etc., you want to build, learn, play with or just show off.

or you can just pop in to say Hi.

Time: 10.30 to 5.00
43  Using Arduino / Networking, Protocols, and Devices / Re: Fire ALarm protocol on: July 23, 2012, 04:38:46 am
You will probably need to sign a NDA (none disclosure agreement) to get actual details of their serial protocol. Ask them they might release it to you.

44  Community / Local Groups / Re: A regular Arduino meet up based in Manchester, UK on: July 18, 2012, 05:04:35 am
...
I was astonished when I could not find a single, regular meet up for Arduino lovers in the UK. Sure there were one-off events or general hackerspaces being organised but nothing monthly/regular for the community to meet up, share ideas, prototypes, get/give advice or share experiences.
...
Hmm, there are plenty of regular Arduino meet ups in the UK, just because they happen in a hackspace doesn't make them any less relevant. We have them every 2-weeks in our Maker Space @ Newcastle and have regular Arduino themed workshops. What you've said "community to meet up, share ideas, prototypes, get/give advice or share experiences" is what hackerspaces do anyway.

Anyway, good luck with meetup and if you're in the Newcastle area you're welcome to drop into our Maker Space any time.

45  Development / Other Hardware Development / Re: Good PCB desgin software on: June 28, 2012, 04:37:30 am
Have a look at Design Spark PCB. It's free and has no size limitations.
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