shahabmusic
New Member
hi,
I have a motorized LCD in my car and when I turf off the engine it goes inside but when ignition switch is on, it wont turn on and I have to push the EXIT button to turn on lcd and open it.
LCD front panel uses resistive technology for buttons I guess. because when I add some cables to the exit button to take it few meters away, it does not work.
I am currently simulating EXIT button pressing by using a relay, resistor and a capacitor; i made a circuit that when my 12v line is available, relay contacts turn to close for 1sec and then turn back to open position. this solution is no longer work for me, i would go for a digital one to learn little bit more about electronic and solve this problem.
I found that there is a component called optocoupler that does exactly same job as relay but it's much faster and more accurate... and I found an IC called 555timer. I'm guessing that there would be some ways to make the circuit that I am looking for by using this two components but have no clue how:-(
I would greatly appreciate any sort of help
Shahab![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have a motorized LCD in my car and when I turf off the engine it goes inside but when ignition switch is on, it wont turn on and I have to push the EXIT button to turn on lcd and open it.
LCD front panel uses resistive technology for buttons I guess. because when I add some cables to the exit button to take it few meters away, it does not work.
I am currently simulating EXIT button pressing by using a relay, resistor and a capacitor; i made a circuit that when my 12v line is available, relay contacts turn to close for 1sec and then turn back to open position. this solution is no longer work for me, i would go for a digital one to learn little bit more about electronic and solve this problem.
I found that there is a component called optocoupler that does exactly same job as relay but it's much faster and more accurate... and I found an IC called 555timer. I'm guessing that there would be some ways to make the circuit that I am looking for by using this two components but have no clue how:-(
I would greatly appreciate any sort of help
Shahab