Hi all,
Forgive me if I am not explaining things very well but i have a problem i was hoping someone could point me in the right direction for...
I have a car stereo which for the auto dimming to work properly, needs 12v to trigger it to change from day to night mode. For some reason (I am trying not to get bogged down in the 'why' of) the illumination circuit of the car is only producing a steady 7v. I am not sure if this is normal or not, but when I get time I will check out another car and see if it is common or not.
Sooooo What I am trying to achieve is using this 7v 'trigger' voltage to switch a 12v circuit to the stereo so it will go from day to night mode.
I had tried to wire in a generic automotive relay, but the 7v was not enough to close the coil it just made a 'clicking / humming' noise so i suspect its trigger/coil voltage was too low.
What options are there available use this 7v to switch a 12v circuit to the illumination of head unit?
I should mention that the 12v in question that I was going to use was the ignition wire that runs to the head unit which from what I read from VW does not carry much current at all, it in itself is merely a trigger to tell the headunit to actually turn on.
Any guidance would be greatly appreciated.
Cheers
Forgive me if I am not explaining things very well but i have a problem i was hoping someone could point me in the right direction for...
I have a car stereo which for the auto dimming to work properly, needs 12v to trigger it to change from day to night mode. For some reason (I am trying not to get bogged down in the 'why' of) the illumination circuit of the car is only producing a steady 7v. I am not sure if this is normal or not, but when I get time I will check out another car and see if it is common or not.
Sooooo What I am trying to achieve is using this 7v 'trigger' voltage to switch a 12v circuit to the stereo so it will go from day to night mode.
I had tried to wire in a generic automotive relay, but the 7v was not enough to close the coil it just made a 'clicking / humming' noise so i suspect its trigger/coil voltage was too low.
What options are there available use this 7v to switch a 12v circuit to the illumination of head unit?
I should mention that the 12v in question that I was going to use was the ignition wire that runs to the head unit which from what I read from VW does not carry much current at all, it in itself is merely a trigger to tell the headunit to actually turn on.
Any guidance would be greatly appreciated.
Cheers