12-volt triggers are used to activate accessories and other devices connected to a main hub. Often, these hubs act as audio/video receivers, external switches or other processors. Once activated, the hubs send a small signal to the connected device to trigger an action. For projector screens, the trigger allows the projector's activation to dictate the extension and retraction of the screen.
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Things you need
- Motorised screen
- 12 volt trigger cable
Access the rear panel of the projector. If necessary, remove the snap-on cover that protects the audio/video cable connections and other inputs.
Plug in the 12-volt trigger cable the jack marked "12v." This jack is typically a 3.5 millimetre plug-style connection, similar in appearance to a small headphone jack.
Route the trigger cable to the corresponding connector on the screen's housing. Plug the cable into this jack.
Turn on the projector to activate the trigger, and cause the screen to descend. Turn the projector back off to make the screen retract.
Tips and warnings
- Although wiring the trigger is rather easy, the screen still requires 120 volts AC for the motor.
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