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Old 08-19-2011
anjdiot's Avatar
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Backup lights

Well I currently have 2 55w lights mounted to my back rack, currently they are just wired up for an on/off function but I would like to make them more useful. What I would like to do is have them come on with the normal reverse lights but since they are really bright I would like them to be attached to an optional dim mode kind of like high low. I also want to be able to manually be able to control them. Right now made a quick diagram I just want to know if anyone has any ways to make it simpler. The other thing is where would I be able to find a resistor that is about 4 ohms that could handle this power. Sorry I know my hand writing sucks



Fixed what I missed below
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Last edited by anjdiot; 08-19-2011 at 02:16 AM.
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Old 08-19-2011
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Well I knew I would mistakes seeing as this turned into something I am thinking about well really tired and can't fall asleep. At the last relay there should be another switch to control the ground of the relay so I could change the "HiLo" feature of this.
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Old 08-19-2011
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Instead of a resistor you could do a high current mosfet on one side of an op amp and a potentiometer (or set resistor) on the other. The high current resistance on the mosfet side would have to equal the pot/resistor side because of the op amp. That would make it more robust, since you can actually change the brightness by simply turning a ****, plus you wouldn't need the last relay. Your sensitivity would be based on the resistance ranger of the pot
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