supak111
★ƃuᴉɯǝɥɔs sʎɐʍlɐ★
Hi everyone, I need a device that will block light ONLY when voltage is applied to it. I know LCD displays can do this, in fact they have these cheap little keychains now that are solar and blink the screen ON / OFF to show and hide whatever message you have behind the screen. I just need this in a larger version about 7x4 inches.
I tried using switchable "smart glass" tint but that technology is opaque when power OFF and see through when power is ON, I need it to be opposite and not use any power to be visible. Anyone have any ides?
I tried using switchable "smart glass" tint but that technology is opaque when power OFF and see through when power is ON, I need it to be opposite and not use any power to be visible. Anyone have any ides?
![5dbf.gif](/forums/proxy.php?image=http%3A%2F%2Fimg.diytrade.com%2Fsmimg%2F353662%2F10842462-398262-0%2FLarge_Solar_Keychain_with_Digital_thermometer_P117_%2F5dbf.gif&hash=8a2e679adf89f2ba5c7572f3c6c31ac2)