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Connecting rear camera in car with a switch
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<blockquote data-quote="Geoff1946" data-source="post: 497401" data-attributes="member: 28452"><p>This would be easy if we were sat together with a fag packet to draw on!!</p><p></p><p>I think you more or less have it with your sketch.</p><p></p><p>The whole point of a diode is that it will only conduct in one direction. The way I've drawn my scheme that diode will let current flow from the reversing light to the camera to activate the camera. It won't let power applied to the camera from another source flow to the reverse light.</p><p></p><p>It's the diode you have marked as 5amp on your sketch, PROVIDED it "points" the right way.</p><p></p><p>The second diode on your sketch isn't actually needed, though it would still work, again provided it points in the direction of current flow, i.e. towards the camera.</p><p></p><p>The reason the second one isn't necessary is that there is no occasion when current would try to go from the camera back towards the over-ride switch so the wire can just go direct. </p></blockquote><p></p>
[QUOTE="Geoff1946, post: 497401, member: 28452"] This would be easy if we were sat together with a fag packet to draw on!! I think you more or less have it with your sketch. The whole point of a diode is that it will only conduct in one direction. The way I've drawn my scheme that diode will let current flow from the reversing light to the camera to activate the camera. It won't let power applied to the camera from another source flow to the reverse light. It's the diode you have marked as 5amp on your sketch, PROVIDED it "points" the right way. The second diode on your sketch isn't actually needed, though it would still work, again provided it points in the direction of current flow, i.e. towards the camera. The reason the second one isn't necessary is that there is no occasion when current would try to go from the camera back towards the over-ride switch so the wire can just go direct. [/QUOTE]
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Connecting rear camera in car with a switch
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