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What’s the reason to diode isolate?


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bqe. 
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Posted: November 28, 2006 at 4:32 PM / IP Logged  
Why is it necessary to diode isolate a glass break sensor and motion sensor if there not connected to the door sensor?
kgerry 
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Posted: November 28, 2006 at 4:50 PM / IP Logged  
feedback will keep them both on often....
Kevin Gerry
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bqe. 
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Posted: November 28, 2006 at 5:51 PM / IP Logged  
Can u explain how and why the feedback would occur without any of the sensor's being  triggered?  Thanks
bsd1 
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Posted: November 29, 2006 at 12:06 PM / IP Logged  
If both sensors are connected to a dedicated (not shared with door trigger) sensor input (same zone) of your brain, logically that doesn't matter because your brain can't identify which is which when it's triggered.
When they are connected together to the door trigger, for instance, feedback can cause your domelight to be on unexpectedly. Other than that, isolation with diode doesn't make much sense.
Say I connected hood and trunk triggers to the same input, same zone violation appears on your 2-way remote display anyway.
KarTuneMan 
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Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member consistently provides reliable informationspace
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Posted: November 30, 2006 at 3:57 AM / IP Logged  

A diode STOPS both a NEG(-) signal and a POS(+) signal from going in a certain direction....depending on the placement of the diode.

posted_image

In some cases....bigger IS better...

evois 
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Posted: November 30, 2006 at 11:41 AM / IP Logged  
taking this diagram as correct, why is it that if you use an ohmmeter it shows continuity if I use the (+) of the ohmmeter to the (+) of the # 1 diagram and the (-) of the ohmmeter to the (-) of the diagram?  Is it because electricity travels (-) to (+)?
jpease 
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Posted: November 30, 2006 at 10:38 PM / IP Logged  
anyone know a good place to buy diodes online used for automotive security online and what should I buy. Link?
evois 
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Posted: December 01, 2006 at 6:55 AM / IP Logged  
it's easily accessible, at radioshack.
dea,can 
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Posted: December 03, 2006 at 2:51 AM / IP Logged  
posted_image
dragon
jpease 
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Posted: December 04, 2006 at 9:42 AM / IP Logged  

evois wrote:
it's easily accessible, at radioshack.

anyone have a part number/sku?   or link?

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