Light Valve - ARK-IoT/ark-hackathon GitHub Wiki
welcome aboard > kit > sensors > liquid crystal light valve
- Outline size: 96.5 x 38.0 x 2.0 mm
- View area: 88.5 x 34.5 mm
- Driving voltage: 5.0V
- LCD type: TN, transmissive, positive
- Operating temperature: -10° to 60°
- Product Dimensions:
- 97.0mm x 38.0mm x 2.0mm / 3.8" x 1.5" x 0.1"
- Product Weight: 14.4g / 0.5oz
- https://www.adafruit.com/product/3330
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 and one the LCD, once activated with a voltage, will stay at that darkness level even if the voltage is removed. So, if you want to have it turn on and off, you'll need to drive it with a 0V signal to 'open' it up, or connect a draining resistor between the two pins to leak the voltage off when not powered.
src: adafruit.com
| guide | url |
|---|---|
| Adafruit: 3D Printed Electronic Sunglasses Project | https://learn.adafruit.com/3d-printed-electronic-sunglasses |
| Adafruit: Mystery Box: Shutterglass Chamber Project | https://learn.adafruit.com/shutterglass-chamber |