Adafruit Large Liquid Crystal Light Valve - Controllable Shutter Glass

Key Features Used to provide a "reveal" effect for your project, as you can control the opaqueness of the LCD Tinted gray color when not powered 5V Max recommended usage Blocks at least 95% of ligth with the max voltage applied View area: 88.5 x 34.5 mm What do you get when you power a layer of liquid crystal material sandwiched between two sheets of glass? A Liquid Crystal Light Valve (a.k.aa LCD Controllable Black-out Panel)! They're often used for electric welding helmets because they can protect the welder's eyes from the bright sparks. Or – if you aren't a welder – they can be used to provide a "reveal" effect for your project, as you can control the opaqueness of the LCD.A Liquid Crystal Light Valve (LCLV) is a device that uses the properties of liquid crystals to control the level of illumination passing through an optical system. It's basically what goes on in your LCD monitor/TV/projector etc, but for each individual pixels.In this product, we have one huge LCD piece, which wi