| Your electric projection screen comes with a switch | | | | screen. When the projector is turned on, it send a |
| that allows you to operate your screen. But just | | | | signal through the wire to the box, which translates it |
| because that's included, doesn't mean you have to | | | | into a signal for the projection screen and tells it to roll |
| stop there. Because free is great, but what about the | | | | down. When the projector is switched off, the |
| WOW-factor of having the screen roll down as soon | | | | opposite happens: the screen rolls up. |
| as you turn on the projector? If you are use to getting | | | | If your projector does not have a 12V output or you |
| out of your chair, you'll love using a trigger. Plus, your | | | | want a wireless (infrared) solution, you can use a |
| friends won't believe their eyes. | | | | power sensing trigger. This trigger consists of two |
| So let's go into a little bit more detail. | | | | parts: a receiver that's connected to the projection |
| What does a trigger do? | | | | screen and an transmitter that's connected to the |
| Triggers allow another device to lower your projection | | | | projector. When the projector is turned on, the |
| screen - automatically - when you turn on that device. | | | | transmitter senses the power consumption of the |
| This device can be an amplifier or your projector. The | | | | projector go up. It then sends an infrared signal |
| signal is either sent by a wire or by an infra red signal, | | | | (wirelessly) to the receiver, which translates it in a |
| depending on your trigger type. You normally use a | | | | signal for the screen to go down. Again when the |
| trigger in stead of your standard switch and it's an | | | | projector is switched off, a signal is sent to the |
| accessory you buy with your screen. It's not a | | | | receiver and the projection screen rolls in. |
| standard item that you get with your projection screen. | | | | Keep in mind that when you use an infrared trigger, the |
| The whole triggering process is automatic, meaning | | | | transmitter and receiver have to be aligned, as for the |
| that you need to do nothing else than turn on your | | | | IR signal to work, there has to be a free line-of-sight |
| projector or amplifier. We'll now look at these triggering | | | | for the transmitter. |
| devices and the other hardware you need to make | | | | B. Using your amplifier as the triggering device |
| this set up work. | | | | If you want to use your amplifier as the triggering |
| What do you need? | | | | device, you need to have a 12V output on it. That's |
| - an electric projection screen | | | | because the power sensing option would not be |
| - a projector with or without 12V output or amplifier | | | | practical. Because if you just want to listen to some |
| with 12V output | | | | music, you don't want the projection screen to be |
| - a trigger box | | | | lowered automatically. |
| The triggering system only works with electric | | | | For the rest, the operation and installation is the same |
| projection screens, so that's requirement number one. | | | | as with projectors that have a 12V output. |
| Then, you need a device that "sets off" the triggering | | | | Now what are the big benefits of triggering your |
| process. That's either your projector (doesn't matter | | | | projection screen in stead of using the standard |
| whether it has a 12V output or not) or your amplifier | | | | switch? |
| (has to have a 12V output). And lastly, you need a | | | | 1. You won't have to get out of your chair anymore to |
| trigger box that translates the signal from your | | | | operate the screen |
| projector or amplifier to a command that tells your | | | | 2. You add a wow-factor to your home theatre that'll |
| projection screen to roll in or out. | | | | really impress your friends. |
| What are the possible set-ups? | | | | And what are the drawbacks? |
| A. Using your projector as the triggering device | | | | 1. There's no way of moving the screen without turning |
| If you use your projector as a triggering device, you | | | | your projector or amplifier on or off. There's normally |
| have to check whether your projector has a 12V | | | | no need for this, but it is something to keep in mind. |
| output. This connection should be indicated on the back | | | | 2. It's an option you have to pay for. |
| of the projector. Look for an opening that would take | | | | So that's it, you now know what a trigger can do for |
| a 2.5 or 3.5mm jack. If you have a 12V output you can | | | | you and what you need. Now go out and make the |
| use the 12v trigger box. This trigger box is connected | | | | most of your electric screen. |
| by a wire to both the projector and the projection | | | | |