Re: diy microwave alarm

[joe hey <joehey@xxxxxxxxxxxxxx>]

On Sat, 03 May 2014 09:17:25 +0000, joe hey wrote:

> On Sat, 03 May 2014 01:28:52 -0500, G. Morgan wrote:
>
>> joe hey Wrote:
>>
>>>On Fri, 02 May 2014 14:11:30 -0500, G. Morgan wrote:
>>>
>>>> joe hey Wrote:
>>>>
>>>>>(What is a 'PE beam'?)
>>>>
>>>> Photo-electric
>>>
>>>PE beams would be fine if they could span about 200 m in heavy rain.
>>
>>
>> You would need an array, and if CCTV breaks the budget than PE beams
>> are out of the question.
>
> oh, my bad, I thought CCTV would just be more expensive than PE.
> After all, I thought, PE is just an infrared emitting diode on the one,
> and a receiving photo diode on the other side.
>
> But maybe this is something useful?
> http://www.aliexpress.com/item/P92-Wired-250M-Alarm-Triple-Beam-
> Photoelectric-Infrared-LED-Detector-Tamper-Alarm-Output/1011069523.html
> It would only require 6 of those sets to cover al sides...
>
> Totalling about $380, wiring excluded!

Oh, and solar panels for power, batteries for during the night.
And then have it all stolen one night...