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What do you get when you power a layer of liquid crystal material sandwiched between two sheets of glass ALiquid Crystal Light Valve (a.k.aa LCD Controllable Black-out Panel)!They#39;reoften used for electric welding helmetsbecause they can protectthe welder#39;s eyes from the bright sparks. Or ndash; if you aren#39;t a welder ndash;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#39;s basically what goes on in your LCD monitor/TV/projector etc, but for each individual pixels.
In this product, we have one small LCD piece, which will filter what you see through it. Normally, it#39;s a tinted gray color (because the light around us is not polarized, it is not completely clear). There are two electrodes that you can put a voltage across to change the opacity.
By changing the voltage applied, it will block light more and more. Starting at about 1.0VDC the glass will start darkening. At about 4.0V the glass will be opaque. 5V is the max recommended voltage. In between you will get darker shades. Note that it is not capable of blocking 100% of light, but it looks like it blocks at least 95%. If you put a bright light behind it, you will see some light shine through!
Almost no current is used. Once activated with a voltage, the glass will stay at that darkness level even if the voltage is removed. So, if you want to have it turn on and off, you#39;ll need to drive it with a 0V signal to #39;open#39; it up, or connect a draining resistor between the two pins to leak the voltage off when not powered.
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Informazioni aziendali
ROBOT DOMESTICI SRL - Via Cornelio Labeone, 70 - 00174 Roma (RM)
Partita IVA IT15791431008 - REA di Roma n. RM 1614298
CODICE FATTURAZIONE ELETTRONICA: KRRH6B9
Tel. (+39) 06 76971136 | e-mail: info@robot-domestici.it