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Equipment Selection
Projectors
To be seen in daylight, the projector must be very bright. Relevant units of measuring light's intensity are Lumens(lm) and Lux. Lumens are a measure of the intensity of the light leaving a source, while Lux is a measure of the intensity of light reaching a surface. The unit lux is lumens per square meter, so Lux takes into account the area to be illuminated. If 1,000 lumens were focused onto one square meter, that square meter would be lit with an illuminance of 1,000 lux. The same 1,000 lumens spread over 10 square meters would light the space with 100 lux. Recommended lumen rating for a projector to be used in a room with sunlight is at least 2,000 lumens. This should be the minimum lumen rating for a projector if it is intended to be visible during the day. The other side to consider is that 2,000 lumens will be very bright at night, so a projector with variable brightness may be desired.
A wide range of projectors was considered, including a range of price and intensities. Each projector has a certain balance of cost, intensity, and performance. These were the primary attributes considered when choosing a projector for an installation. The projectors that were considered are:
| Model | List Price | Lumens | Dimensions (WxLxH) | Features / Comments |
|---|---|---|---|---|
| ViewSonic PJ503D | $500 | 1500 | 10.4" x 3.8" x 8" | 800x600 Resolution, 2000:1 Contrast Ratio |
| Epson PowerLite 77c | $750 | 2200 | 7.5" x 16.9" x 14.9" | 34' Projection Range, 25' Max Image Size, 1024x768 Resolution, 400:1 Contrast Ratio |
| InFocus IN26+ | $750 | 2400 | 12" x 9.4" x 4" | 33' Projection Range, 21' Max Image Size, 1024x768 Resolution |
| InFocus IN10 | $1,249 | 1800 | 2.5" x 7.8" x 6.1" | Can project from up to 16',* Built in speakers, 1280x1026 Max resolution, 4000 hour lamp life, 1100:1 contrast ratio |
| InFocus Work Big IN10 Ultra-Mobile 3LB | $1250 | 1800 | 7.8" x 6.1" x 2.5" | 22' Max Image Size, 1280x1024 Resolution, 1100:1 Contrast Ratio |
| Epson PowerLite Home Cinema 720 | $1,299 | 1600 | 4.9" x 16.0" x 12.2" | Can project from up to 22',* No speaker, 1280x720 Max resolution, 3000 hour lamp life, 10000:1 contrast ratio |
| Optoma EP729 Micro Portable | $1500 | 1600 | 6" x 2.46" x 7.87" 2.2 lbs | 25' Max Image Size, 1024x768 Resolution, 2200:1 Contrast Ratio |
| Canon REALiS SX7 | $5,200 | 4000 | 4.5" x 10.6" x 13.2" | Can project an image from up to 16'* Built in speakers, 1600x1200 Max resolution, 2000 hour lamp life, 1000:1 contrast ratio |
Note: * Brightness diminishes with distance
Webcams
| Model | List Price | Video Resolution | Frame Rate | Snapshot Resolution | Features / Comments |
|---|---|---|---|---|---|
| USB 3 LED PC Webcam Camera plus | $11 | 800x600 | 15 fps | 800x600 | 6 LEDs mounted around lens for additional light; Focus adjustable with ring around lens |
| Logitech 961400-0403 Quickcam | $17 | 640x480 | 15 fps | 640x480 | Integrated microphone |
| Microsoft LifeCam VX-3000 | $27 | 640x480 | 30 fps | 1280x960 | Integrated microphone; Automatic face tracking software; Pan, tilt, zoom control supported |
| Logitech QuickCam Deluxe | $41 | 640x480 | 30 fps | 640x480 | Integrated microphone; Automatically adjusts audio and video to compensate for background noise or lighting |
| Microsoft LifeCam VX-6000 | $40 | 1280x1024 | 30 fps | 2560x2048 | Integrated microphone; 71 degree wide angle lense; Pan, tilt, zoom control supported |
| Logitech QuickCam Pro 9000 | $72 | 1600x1200 | 30 fps | 1600x1200 | Integrated microphone |
| Panasonic BL-C131A Network Camera Wireless | $277 | 640x480 | 30 fps | 640x480 | Integrated microphone; 802.11 wireless; View video from a standard web browser, video display, or compatible cell phone or PDA; 8 preset shooting positions; Integrated heat sensor to detect person entering vicinity |
Interactive Whiteboards
Interactive whiteboards are a possible implementation for the Spray It Forward installation, with the suggestion that they could be expanded to communicate between all the installations to unify and link them together. Interactive whiteboard products, such as: Mimio Interactive and NEC IW77 Interactive Whiteboard cost from $700 up to $4000-$5000 of some other models. Using ready product interactive whiteboards is difficult from a cost standpoint. The alternative is to create an 'interactive whiteboard' using a projector and one or more Wii Remotes. Johnny Lee has instructions for using Wii Remotes and pens that emit infra-red light to simulate an interactive whiteboard. This is am more cost effective option.
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