create a ground when armed

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KPierson

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Joined: April 14, 2005

Location: Ohio, United States

Posted: February 09, 2010 at 9:53 PM / IP Logged

The NPN transistors would be 2n3904 or similar and the PNP is a 2n3906 or similar. The current output is limited to around 150mA. You may add a smaller resistor to increase current output.

The diodes are 1A 1n4001s or similar.

Kevin Pierson

oldspark

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Joined: November 03, 2008

Location: Australia

Posted: February 09, 2010 at 10:01 PM / IP Logged

Or use 2 relays.

Ha! Here I am suggesting "multiple relays" instead of "one electronic circuit". Ain't that a flip!? (Viz those 4-8 relay switching conglomerations!)

KPierson

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Joined: April 14, 2005

Location: Ohio, United States

Posted: February 09, 2010 at 11:18 PM / IP Logged

I stayed away from relays due to their current consumption. I guess I could have used reed relays but I thought a transistor based solution would look more impressive in paint!

Kevin Pierson

tedmond

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Joined: January 06, 2007

Location: Ontario, Canada

Posted: February 10, 2010 at 7:45 AM / IP Logged

Kevin, wonderful diagram.

but yes, too much time of your hands ! ahah i kid.

i still want to order something from KPT but dont know what create a ground when armed - Page 2 -- posted image.

Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

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Ween

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Joined: August 01, 2004

Location: Illinois, United States

Posted: February 10, 2010 at 9:47 AM / IP Logged

hi,

dual coil latching relay, with diodes in series on the coil leads. wire the coils to the door lock motor in the drivers door. the set coil will latch with the lock signal, and reset with the unlock, you'll need to add a relay to 'disable' the output when the doors are locked while driving, otherwise you'll have the 508 triggering unnecessarily. did a setup like such in a Prowler years back.

KPierson

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Joined: April 14, 2005

Location: Ohio, United States

Posted: February 10, 2010 at 1:55 PM / IP Logged

yes, that would work as well!

Kevin Pierson

i am an idiot

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: February 10, 2010 at 6:59 PM / IP Logged

How about a magnet attached to the door lock mechanism, and a magnetic reed switch positioned where the magnet closes the contacts when the door is locked?

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create a ground when armed

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