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Two 12V Signals to Allow 12V to Pass?


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loneshark 
Member - Posts: 15
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Joined: June 12, 2005
Location: United States
Posted: September 19, 2020 at 3:02 AM / IP Logged Link to Post Post Reply Quote loneshark
hello the12v fam, long time no see. im trying to create sort of an AND gate circuit that allows ~12-14v to pass when the A and B are receiving ~12-14v. the application is for an automotive blinking tail light system. the constants are the voltages present in a basic 4 wire trailer wire connector. the wires are yellow (left blinker or stop), green (right blinker or stop), brown (parking light), and white (ground).
what i need to happen is when yellow and green are hot, 12 volts is allowed to pass which goes on to a (blinker circuit that i have already purchased) but only when yellow and green are hot. how would i go about determining what components to use? thanks in advance.
im thinking some sort of SPST or DPDT relay, but unsure. thanks in advance for the assist.
Two 12V Signals to Allow 12V to Pass? -- posted image.
Ween 
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Posted: September 19, 2020 at 12:47 PM / IP Logged Link to Post Post Reply Quote Ween
Have you looked into a third brake light logic circuit/module?
loneshark 
Member - Posts: 15
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Joined: June 12, 2005
Location: United States
Posted: September 19, 2020 at 3:17 PM / IP Logged Link to Post Post Reply Quote loneshark
YES, exactly what i needed. thanks a lot. im tempted to buy 2, and smash one open to see how it works, i spent hours searching for components to make my own. lol. thanks for the reply Ween
Ween 
Platinum - Posts: 1,325
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Joined: August 01, 2004
Location: Illinois, United States
Posted: September 19, 2020 at 3:18 PM / IP Logged Link to Post Post Reply Quote Ween
http://www.tonyvanroon.com/oldwebsite/circ/3brake.htm
that should give a idea of the circuitry, there are probably other ways.
tonanzith 
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Joined: July 18, 2008
Location: Washington, United States
Posted: September 22, 2020 at 12:44 PM / IP Logged Link to Post Post Reply Quote tonanzith
not sure where 24v is coming from i only see two 12v signals, a 3rd brake light module would be easy but also a pac tr-7 would be totally programmable for a more universal application.
Gary Sather
Ween 
Platinum - Posts: 1,325
Platinum spacespace
Joined: August 01, 2004
Location: Illinois, United States
Posted: September 23, 2020 at 2:41 PM / IP Logged Link to Post Post Reply Quote Ween
Just curious, which configuration on the TR-7 would be applicable?

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