Archive for July, 2009
can you use regular printer paper instead of transparency paper for overhead projector unit?
July 30th, 2009 | 
Author:
it’s not really thin enough for you to be able to see through it…most people use the copy paper to help section off parts of the transparent paper. you can try tracing paper maybe.
Posted in 
Where can I buy an overhead projector Fresnel lens online?
The dimensions do not mater much. As long as it is capable of focusing light on a specific point for a science experiment.
Lots of places sell them, in a variety of sizes. If you don’t care how big it is, most book stores sell small ones (for reading small print) and you don’t even have to go online.
But if you want to get it online, google shopping gives lots of places –
http://www.google.com/products?hl=en&q=fresnel+lens
Closed Head Single Lens Overhead Projector with 39″” Overhead Cart OHC39-9014EDC
Buhl’s 9014 Overhead Projectors are perfect for general classroom use. Constructed of high-impact molded plastic, the split-case design provides both easy maintenance access and durability. Features: -Low maintenance, highly durable plastic case -Rack and Pinion focusing - 10″” x 10″” stage -Dust-free sealed singlet head -75 hour lamp life -2200 ANSI lumens, EYB 360 watt lamp -Built-in cord management system -3-wire AC cord/safety interlock switch -17 watt whisper quiet fan -Thermal cut off switch -39″” Overhead projector cart with 4 casters (2 locking) -UL/CSA listed -Limited Lifetime Warranty