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relay, keysense wire


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rick28546 
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Member spacespace
Joined: January 04, 2009
Location: North Carolina, United States
Posted: August 24, 2010 at 9:51 PM / IP Logged  

Here is my situation. I have a keysense wire that is normally negative and turns open when the key is inserted. I need to make this wire a negative when the key is inserted. I know there's a way to do this with a 10k resistor, but I dont remember how. If somebody could please post a diagram of this I would greatly appreciate it. Thanks

oldspark 
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Posted: August 24, 2010 at 10:24 PM / IP Logged  
I presume you mean goes from +ve to negative when the key is inserted....
That can't be done with a resistor - it needs an inverter (whether an inverting relay or a transistor (etc) inverter.
rick28546 
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Member spacespace
Joined: January 04, 2009
Location: North Carolina, United States
Posted: August 25, 2010 at 5:55 AM / IP Logged  
No. In a 2008 Lancer the keysense is normally (-) and when a key is inserted it goes to an open or neutral state. I need it to become negative when the key is inserted. Thanks again
oldspark 
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Posted: August 25, 2010 at 6:49 AM / IP Logged  
That's what I meant.
The answer remains the same.
rick28546 
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Member spacespace
Joined: January 04, 2009
Location: North Carolina, United States
Posted: August 25, 2010 at 12:00 PM / IP Logged  
Found the answer. It turns it to a positive, but I can make it work. Its techtip 1921. Thanks!
oldspark 
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Gold spacespace
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Posted: August 25, 2010 at 6:23 PM / IP Logged  
Is that an inverting relay?
rick28546 
Member - Posts: 7
Member spacespace
Joined: January 04, 2009
Location: North Carolina, United States
Posted: August 25, 2010 at 7:21 PM / IP Logged  
No relay, just need 2 diodes, a fused 12v source and a 10k resistor. If you search for techtip 1921 I'm sure a diagram will come up.
oldspark 
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Posted: August 25, 2010 at 7:42 PM / IP Logged  
Alas no, I find nothing in the search....
I'm curious how it was done given your description.... (since inversion is required)...
Can you post the link or fig?
Thanks in anticipation.
rick28546 
Member - Posts: 7
Member spacespace
Joined: January 04, 2009
Location: North Carolina, United States
Posted: August 25, 2010 at 8:20 PM / IP Logged  
If you send me your email I will email it to you. It is mostly used for door triggers, but will work for my situation as well
dualsport 
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Posted: September 25, 2010 at 10:37 AM / IP Logged  
rick28546 wrote:
Found the answer. It turns it to a positive, but I can make it work. It's techtip 1921. Thanks!
If it turns it to a positive, it's not inverting. Simple enough, but with the componennts described, it won't achieve the goal originally described, which was a negative output when the keysense is opened up.
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