Hello all, this is my first post and I'm looking for some help in designing a circuit.
Firstly let me say I enjoy basic electronic projects but to date my experience has been limited to simple lighting circuits and modifying consoles for a/v outputs etc. Simple connect wire from here to here stuff.
I want to design a circuit that will open the windows of my car by say 2cm when the door is opened then close the window when the door is closed. I was thinking of using the door courtesy light as a trigger. This is a light in the door that only comes on when the door is opened. My intention was to use two relays as in one normally open and one normally closed to operate as follows:
Door opened +12V from courtesy light to both relays.
Normally open relay closed starting timer to run window motor for 1 second (or whatever time needed to drop glass by 20mm)
Normally closed relay opens resetting second timer
Door closed, courtesy light off.
Normally open relay returns to open resetting timer
Normally closed relay starts timer to run window for 1 second (or whatever time is needed to close window again)
The glass on my car doors is frameless. At present when opening and more so closing the door you are pushing against the rubber seals effectively forcing them to 'pop' up and over the glass each time which is less than ideal. There is an aftermarket solution to this but its very expensive and I'm sure I can make something up for a fraction of the cost.
I have been looking at various 555 timer circuits but the struggle seems to be having a momentary switch. My triggers are going to be either constant 12v or no 12v. With a constant power supply the 555 timer seems to repeat itself over and over which obviously won't work.
It might be too much to ask for someone to design this circuit out for me but I would be grateful of any advice.
Firstly let me say I enjoy basic electronic projects but to date my experience has been limited to simple lighting circuits and modifying consoles for a/v outputs etc. Simple connect wire from here to here stuff.
I want to design a circuit that will open the windows of my car by say 2cm when the door is opened then close the window when the door is closed. I was thinking of using the door courtesy light as a trigger. This is a light in the door that only comes on when the door is opened. My intention was to use two relays as in one normally open and one normally closed to operate as follows:
Door opened +12V from courtesy light to both relays.
Normally open relay closed starting timer to run window motor for 1 second (or whatever time needed to drop glass by 20mm)
Normally closed relay opens resetting second timer
Door closed, courtesy light off.
Normally open relay returns to open resetting timer
Normally closed relay starts timer to run window for 1 second (or whatever time is needed to close window again)
The glass on my car doors is frameless. At present when opening and more so closing the door you are pushing against the rubber seals effectively forcing them to 'pop' up and over the glass each time which is less than ideal. There is an aftermarket solution to this but its very expensive and I'm sure I can make something up for a fraction of the cost.
I have been looking at various 555 timer circuits but the struggle seems to be having a momentary switch. My triggers are going to be either constant 12v or no 12v. With a constant power supply the 555 timer seems to repeat itself over and over which obviously won't work.
It might be too much to ask for someone to design this circuit out for me but I would be grateful of any advice.