[Noisebridge-discuss] Technical question: Directionally sensitive photosensors

[Christoph Maier]

Has anyone tried a LED with lens as sensor?

On Jun 10, 2013 4:51 PM, "Norman" <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> 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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