Re: Tech Help!

["Petem" <petem001@xxxxxxxxx>]

"Doug" <not@xxxxxxxx> a écrit dans le message de groupe de discussion :
3Wykn.24853$sx5.306@xxxxxxxxxxxxxxx
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> "Jim" <alarminex@xxxxxxx> wrote in message
> news:6912b086-63a1-492f-81bb-447e4bc39c2f@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> On Mar 6, 2:35?pm, "Doug" <n...@xxxxxxxx> wrote:
>> "Spellcheck Patrol" <alarminst...@xxxxxxx> wrote in message
>>
>> news:be04f2c8-8d42-43e9-81a5-f3defeb77607@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> On Mar 4, 11:27 pm, Jim <alarmi...@xxxxxxx> wrote:
>>
>> >That's where those 72 beautiful LEDs come into play. Works in 0 lux
>> >with an IR distance of 150 feet
>>
>> I've yet to see a low cost IR camera that in the real world performs
>> anywhere close to what the manufacturers specifications claim. It seems
>> common for the manufactures to grossly exagerate the performance of their
>> LED equipped cameras.
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>> Doug
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>>I always quote half the distance claimed by the manufacturer.
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> The usable image may even be less than that, and to make it worse I'm not
> sure that many people read the power requirements which may be 100-200mA
> range in the daytime but could easily be in the 1.5 to 2.5 amp range at at
> night when the LEDs come on, they then hang these things on the end of
> several hundred feet of 22 gauge wire or cat5 with two pairs used for
> power and wonder why they don't work properly.
>
> Doug
>

Doug, Its common knowledged that low voltage doesnt need big wiring  ;-)))