How do you do....it? Thread, Advice for projector and IWB in large school hall. in Technical; I have been asked to look into putting a IWB and Projector in our large school hall. They want some ...
8th October 2008, 08:55 PM #1
Advice for projector and IWB in large school hall.
I have been asked to look into putting a IWB and Projector in our large school hall. They want some sort of board that will lower down at the front of the stage and then can be put back up. I have no idea what to do or what to look for. I now the projector is a issues as well as the roof is high and i don't think that they would approve of long permanent pole hanging from the ceiling,
Any body got any thing similar or have any advice,
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8th October 2008, 09:05 PM #2
Do you actually need a IWB? a standard screen would make things easier.
8th October 2008, 09:14 PM #3
For the projector you could get either:
a) a powerful one, and then get a long throw lens;
b) a so-called Short-throw one, they stick out about a foot or two, but have a clever refracting prism, to split the picture out;
For the IWB, you're gonna need to get some complicated engineering done, if they REALLY want it to rise/lower. We have a normal screen that is about 8 foot high, and this needed a special beam in to support it.
You can get IWBs with an attached projector (the short-throw type), that is mounted on wheels, and can be rolled into place.
8th October 2008, 11:32 PM #4
- Rep Power
Never seen the attraction of IWB myself. The price scales with the size of board.
You can get most of the functionality with a gyromouse and an ordinary screen and projector for a lot less dosh.
First you need to decide how big a screen you want, and what you are going to do with it.
To show mostly films get a 16:9 screen, mount centrally, and pay for a good movie projector or get by with a 4:3 projector and wait until movie projectors become cheaper.
To show mostly presentations get a 4:3 screen, mount off centre - you want the speaker to share the stage/platform with the presentation, not be nudged out to the edge.
The bottom of screen should be no higher than it needs to be for clear viewing by the audience - you don't want the front row getting a crick in their neck.
If you're going to be doing presentations, then the screen should be far enough back that the speaker can see the screen themselves. If you have loudspeakers close to the stage, there is probably an audio-feedback danger zone at the front, so the speaker will have to be behind that and then the screen further back.
Projector mounting: if you think of your hall as a cube there are 6 ways of mounting the projector.
1. From the side
2. From the other side.
For these options you can use horizontal keystone on the projector or project diagonally across the hall with the screen at a bit of an angle. Much better to mount the screen at an angle, ideally you want the screen's view of the audience to bisect the audience such that the extreme left most person's angle of view is equal to the angle of view of the extreme right-most person's view.
3. From the orchestra pit (or similar location for those that don't have orchestra pits)
4. From the ceiling. For God's sake don't make the mistake of hanging the projector in front of the lighting bar unless your Transylvanian parentage makes ceiling level visits to remove and replace the projector something you would enjoy doing anyway. Mount it at the same point as the lighting bar or behind. Hanging it off the lighting bar is a good idea as it is a) nice and strong and b) already there
Don't forget that your projection will have to clear a pelmet. If you are projecting from significantly above the pelmet, then the shadow zone increases as the screen moves further away from the pelmet. (So try and keep the screen close to the pelmet, or project horizontally)
5. From the back of the hall. You don't need a more powerful projector, just a longer lens. AFAIK the only projectors that have interchangeable lenses are Sanyo and Hitachi. Roughly £1000 for a non-standard lens.
6. From the back of the stage onto a special back-projection screen. You will need a slightly more powerful projector for the same screen size.
There are always trade-offs. For example, instead of getting a longer lens, you could use a standard lens and put the same money into a bigger screen - it just wouldn't be as bright.
Another option is to put two smaller screens on either side of the stage. (If you're determined to go the IWB route then the only extra thing you have to do for this is to clone the presenter and Bobs your uncles.)
Thanks to diagram from:
projector1 (30th April 2009)
8th October 2008, 11:50 PM #5
We have a projector with a powerful lens at the rear of our hall that projects onto a remote-controlled up/down screen (not interactive though). We used GV Multimedia.
It can be seen as the white "bar" above the stage area in the photos on our main hall virtual tour page. The projector is at roughly the same height as where the foot of the curtains are.
Last edited by webman; 8th October 2008 at 11:53 PM.
9th October 2008, 12:50 AM #6
Don't forget to make sure that your lighting rig is load rated (alot aern't), and that the potential weight of the projector is taking into consideration when the lights are rigged/moved.
Originally Posted by diagram
As far as an IWB goes, i'm not sure it would even be useable (given the size you'd need, it'd be far too high to stand at)? I'm assuming they probablay mean just a projection screen, but teacher speaking for a projector appears to be 'Oh put in an IWB'. We've got a screen with a remote on the wall.
You can get this sort of thing too. Harkness SI 100 electric projector lift system - Projector ceiling mount kits
9th October 2008, 12:58 AM #7
We have a rather rickety motorised ceiling-mounted device that unrolls itself when a button on the stage is pressed. It has a distinctly home-made look about it, and has probably been there since the 1960s when the hall was built. To be honest, we often find a floor-standing pop-up screen a lot easier and less hassle to use. Takes literally seconds to pop up.
Originally Posted by Kyle
I'd go with the previous post that said use a gyro mouse and keyboard - we've just got a couple in from Tesco, they're cool (although the mouse takes a little bit of getting used to). You could also use a tablet PC to control a PC connected to the projector. You could also look at Mimio / E-Beam - you might be able to permanently mount one of those above a drop-down screen of some kind. Also, don't Smart do some kind of portable board?
9th October 2008, 09:21 AM #8
If you want to use it as a IWB then a normal drop down screen, projector and a sympodium from Smart Technologies.
9th October 2008, 10:15 AM #9
A second vote for the sympodium or promethean equivalent - I'd expect that a board big enough for your hall will be too big for anybody to reach the top of to write on!
10th October 2008, 08:13 AM #10
If you go for the non-interactive normal screen, try just adding a remote keyboard and mouse, or even something like the Gyration "air mouse".
It depends really what they intend to use it for and how they intend to use it.
Last edited by SteveLaw; 10th October 2008 at 08:26 AM.
10th October 2008, 10:46 AM #11
Get a tablet PC instead - if you're going to spend money you might as well get a fully functional PC along with your pen screen.
Originally Posted by alan-d
10th October 2008, 07:14 PM #12
What are the dimensions of the hall (including ceiling and any suspended ceiling)? Which wall is the picture going to be projected on?:
Originally Posted by Kyle
It is relatively easy to discuss IWB/projector installs in classrooms because we all have a good idea of how big classrooms generally are.
Beyond a certain size it will become increasingly more difficult to find a solution, either technologically or within an acceptable budget. You may have to compromise somewhere. As you approach this point you really need an expert to come in and discuss your options and give you a quote (assuming your hall is as big as it sounds).
In terms of options for interactivity, we use a Smart Sympodium with dedicated computer in our hall. A small tablet PC may be cheaper option depending on spec but since the projector and it's wiring is basically a fixed installation, it may not offer any advantage other than cost. To enable staff to walk around and interact, we use a Smart Airliner hooked up to the same computer, and have a wireless keyboard available on request.
14th November 2008, 12:07 AM #13
I agree with Busybub with a large hall install you really need a survey to be carried out as there are so many variables it is impossible to specify a system without actually seeing the hall.
Most good companies should be more than happy to visit you and give you some advice on this.
14th November 2008, 09:46 AM #14
- Rep Power
We have had a hall setup for over 3 years now which has been very trouble free so far. Consists of a 116" x 87" rear projection screen from DaLite (motorised so drops down at the front of the stage), Sanyo XT16 projector mounted on the back wall of the stage and a Windows Media Centre PC connected into the hall sound system, all operated with a media centre remote. It was installed by Computacentre (Our LEA has a preferred supplier contract with them) and works very well indeed.
A survey was carried out initally to determine exact requirements and specification, so I would say that an on site survey is a must.
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