PeteThePlanner
Novice Member
Hi there,
I have just purchased a Celexon Electric Tab Tensioned Screen. It has a control box wired to it which contains the IR receiver for the remote control. Ideally I want to set the screen up so that when the projector is switched on, the 12v trigger can instruct the screen to open and conversely, when the projector switches off, the screen retracts. The control box has no facility as I can see to connect the projector's 12v trigger to it. Inside this control box there is an RJ12 port with pins marked as follows:
pin 1 +5v
Pin 2 IR
Pin 3 Up
Pin 4 Stop
Pin 5 down
Pin 6 GND.
When I test the pins with my multimeter. Pins 3,4,5 all have 7.3v on them. I have manual push buttons on the side of the receiver box for up, stop and down. When I test these connections, one side of each switch is connected to ground. The other sides of the switch do not have any voltage on them. I was hoping they would have the same voltage as pins 3,4,5 of the RJ12 on the basis the RJ12 socket would simply be replicating the connections across these 3 switches. When I test these there is no continuity between the push buttons and the RJ12 pins so looks like they are completely independent circuits.
Would it be as simple for me to make connections between, say, pins 5&6 to activate the screen to come down and then pins 3&6 to make it go back up? I am worried that as pins 3,4,5 have voltage on them by connecting one of them to the GND pin would actually cause a short circuit rather than activate the screen operation.
I was hoping I could design and build a simple relay controlled circuit with a timer that is operated via the projector 12v trigger which in turn would connect to the screen's RJ12 port to instruct the controller to open the screen and then do the reverse when the projector switches off. Would anyone have any knowledge of this controller box and how I could perhaps achieve this? If not, I will use the screen with the remote I have.
I have just purchased a Celexon Electric Tab Tensioned Screen. It has a control box wired to it which contains the IR receiver for the remote control. Ideally I want to set the screen up so that when the projector is switched on, the 12v trigger can instruct the screen to open and conversely, when the projector switches off, the screen retracts. The control box has no facility as I can see to connect the projector's 12v trigger to it. Inside this control box there is an RJ12 port with pins marked as follows:
pin 1 +5v
Pin 2 IR
Pin 3 Up
Pin 4 Stop
Pin 5 down
Pin 6 GND.
When I test the pins with my multimeter. Pins 3,4,5 all have 7.3v on them. I have manual push buttons on the side of the receiver box for up, stop and down. When I test these connections, one side of each switch is connected to ground. The other sides of the switch do not have any voltage on them. I was hoping they would have the same voltage as pins 3,4,5 of the RJ12 on the basis the RJ12 socket would simply be replicating the connections across these 3 switches. When I test these there is no continuity between the push buttons and the RJ12 pins so looks like they are completely independent circuits.
Would it be as simple for me to make connections between, say, pins 5&6 to activate the screen to come down and then pins 3&6 to make it go back up? I am worried that as pins 3,4,5 have voltage on them by connecting one of them to the GND pin would actually cause a short circuit rather than activate the screen operation.
I was hoping I could design and build a simple relay controlled circuit with a timer that is operated via the projector 12v trigger which in turn would connect to the screen's RJ12 port to instruct the controller to open the screen and then do the reverse when the projector switches off. Would anyone have any knowledge of this controller box and how I could perhaps achieve this? If not, I will use the screen with the remote I have.