[Noisebridge-discuss] Technical question: Directionally sensitive photosensors

[Norman]

Mike, that is exactly how a phased array works.

Norman

On 6/10/2013 5:07 PM, Mike Schachter wrote:
> Can you just get an array of non-directional photosensors and do the 
> direction-selectivity computationally on an arduino or something?
>
>  mike
>
>
>
> On Mon, Jun 10, 2013 at 4:51 PM, Norman <pryankster at gmail.com 
> <mailto:pryankster at gmail.com>> wrote:
>
>     The only thing I can think of that would be a phased array and
>     would no doubt be very expensive. It might be possible with lower
>     cost components if you are thinking of single axis and can get the
>     timing done accurately enough.
>
>     Norman
>
>
>     On 6/10/2013 4:22 PM, Christoph Maier wrote:
>
>         On Mon, Jun 10, 2013 at 2:54 PM,  <pdbogen at cernu.us
>         <mailto:pdbogen at cernu.us>> wrote:
>
>             On Mon, Jun 10, 2013 at 02:51:48PM -0700, Christoph Maier
>             wrote:
>
>                 Can anyone on this list give me recommendations
>                 (nudge,nugde, Mitch
>                 Altman) how to build cheap photosensors (wink,wink,
>                 Jonathan Foote)
>                 that are highly directionally sensitive?
>
>             What sort of sensing do you need? A photoresistor at the
>             end of a bit of
>             opaque tubing is highly directional..
>
>         Something small and cheap ... Photoresistors and opaque tubing may
>         already be bulky if placed on a nickel-sized PCB ...
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