Thinking about this, capacitive might be the way to go as it can probably reach through glass and there shouldn't be any stray or variable background "noise" as there may be with optical/ir, I am sure I have seen projects along these lines before and have messed with simple capacitive sensors working behind a few mill of wood, then as Andrew says the makey makey is a great way to get button presses out from any kind of input, you can also run similar code on any Arduino with the same result.
Best
Chris
Sent from my iPhone
> On 29 Sep 2015, at 14:12, Andrew Lewis <[log in to unmask]> wrote:
>
> Hi Danny,
>
>
>
> One way that this can be done is with proximity sensors hooked up to a Makey Makey (possibly need a separate Arduino too)
>
>
>
> You could make hot spots within areas of the window display by effectively having the sensors point out through the glass and if something comes close enough (e.g. a few centimetres from glad max) the proximity signal is triggered.
>
>
>
> You might need to scale it to be a logical off or on (0v or 5V), but with a Makey Makey, that translates to button presses, or mouse clicks, etc.
>
>
>
> Your software then just needs to know how to handle the button presses/clicks
>
>
>
> Probably easily doable all on a Raspberry Pi with a Pi-Face sensor board too.
>
>
>
> The only thing you'd need to check is the sensor type:
>
>
>
> Not all Infra-red will go through glass as it is low energy (this is why greenhouses get hot light comes in, heat can get out) - some may
>
> Ultrasonics - not sure that would work either for same sort of reason
>
> Photoresistors could work, but need to work out the ambient lighting. If in a daylight area, should be easy, but at night if the level is low, it might not work.
>
>
>
> Have fun with that one!
>
>
>
>
>
> Date: Mon, 28 Sep 2015 11:00:52 +0000
>
> From: "Birchall, Danny" <[log in to unmask]<mailto:[log in to unmask]>>
>
> Subject: Kinect / windows
>
>
>
> Hi all
>
>
>
> I've got a physical-interaction technology question; I'm hoping some of you might be able to help me with some experience or recommendations....
>
>
>
> We're working on a large display of printed images in a window facing a public street, which we would like to make interactive by allowing the public to vote for their favourite image, from outside in the street. We've explored touchscreens (but the window glass is very thick), and we're thinking that an easier way to achieve this might be through something like a Kinect.
>
>
>
> The device would need to be able to recognise clear gestures of someone selecting an image (perhaps by touching vinyl stickers placed on the window in front of each image) and then recording the data.
>
>
>
> Does anybody have any experience with developing thigs like this, any thoughts about potential pitfalls (dark street, light windows, traffic nearby) and/or development costs?
>
>
>
> Thanks in advance for any pointers.
>
>
>
> Danny
>
>
>
>
>
> Danny Birchall
>
> Digital Manager, Wellcome Collection
>
>
> ________________________________
>
> Shoes: Pleasure and Pain
> Until 31 January 2016 at V&A South Kensington
> Sponsored by Clarks
> Book now on www.vam.ac.uk/shoes<http://www.vam.ac.uk/shoes>
> See the exhibition for free if you join as a V&A Member www.vam.ac.uk/members<http://www.vam.ac.uk/members>
>
> On Their Own: Britain's Child Migrants
> 24 October 2015 - 12 June 2016 at V&A Museum of Childhood
> Admission free
>
> Keep in touch
> Sign up for V&A e-newsletters www.vam.ac.uk/content/email/signup<http://www.vam.ac.uk/content/email/signup/>
> Become a fan on Facebook.com/VictoriaandAlbertMuseum<http://www.facebook.com/VictoriaandAlbertMuseum>
> Follow us on Twitter.com/V_and_A<http://www.twitter.com/V_and_A>
>
> ________________________________
> This message is intended solely for the use of the individual or organisation to whom it is addressed. It may contain privileged or confidential information.
> If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you should not use, copy, alter, or disclose the contents of this message.
> All information or opinions expressed in this message and/or any attachments are those of the author and are not necessarily those of The Victoria and Albert Museum or its affiliates.
> The Victoria and Albert Museum accepts no responsibility for loss or damage arising from its use, including damage from virus. Victoria and Albert Museum, Cromwell Road, London SW7 2RL, Tel: 0207 942 2000
> ________________________________
>
> ****************************************************************
> website: http://museumscomputergroup.org.uk/
> Twitter: http://www.twitter.com/ukmcg
> Facebook: http://www.facebook.com/museumscomputergroup
> [un]subscribe: http://museumscomputergroup.org.uk/email-list/
> ****************************************************************
****************************************************************
website: http://museumscomputergroup.org.uk/
Twitter: http://www.twitter.com/ukmcg
Facebook: http://www.facebook.com/museumscomputergroup
[un]subscribe: http://museumscomputergroup.org.uk/email-list/
****************************************************************
|