Is there a mistake here?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=28584
Printed Date: May 15, 2025 at 10:11 PM

Topic: Is there a mistake here?

Posted By: markcars
Subject: Is there a mistake here?
Date Posted: March 17, 2004 at 9:52 PM

Is the diode polarity reversed/wrong in this?
I bought 2 of these about a month ago but think the drawing has a mistake. Looks like the sensor has -ve triggers but diodes are facing the wrong way.
Am I right or the drawing is right?

posted_image

Replies:

Posted By: Teamrf
Date Posted: March 17, 2004 at 10:05 PM

I think that diagram is right...that diode will only allow that current from the shock sensor to go out so it won't come back and trigger that shock sensor causing false alarms.

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~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.

Posted By: markcars
Date Posted: March 17, 2004 at 10:18 PM

Teamrf, did you check the trigger? It is -ve trigger, not +ve trigger. So the "current" that you are talking about really does not go from the sensor out, but its a -ve. If it was +ve then I think the diagram is right, but since the trigger is -ve I feel the diode must be reversed from what is shown in the diagram.

Can you ask someone to make sure?

Also can someone else check this too please? I want to be 100 percent sure. Thanks.

Posted By: auex
Date Posted: March 17, 2004 at 10:35 PM

Yes it is backwards. Line should be facing the shock sensor.

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: markcars
Date Posted: March 18, 2004 at 4:19 AM

Thanks a lot auex for confirming. After reading the first response, I was beginning to think my brains weren't functioning too well anymore. I can continue now.

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