LCD shutter


#1

Hi, recently took delivery of each size of the LCD Shutters. Can you advise, can they be directly connected to (and controlled by) either an Arduino or Raspberry Pi - I’m mostly thinking of the current required…

Thanks

Andrew


#2

As near as I can tell, the panel is based upon the TN effect. See: https://en.wikipedia.org/wiki/Twisted_nematic_field_effect

The liquid crystal inside the panel is twisted at 0v (at rest) and then re-aligned when a voltage is applied across the panel.

Since the planes of the panel are not electrically connected, you can think of the panel as a very low value capacitor with a layer of insulating crystal. The current consumed to charge this capacitor is nominal, and for your purposes you can probably assume it to be near-zero.

So, in short, yes, you should be able to use an IO pin on the Raspberry Pi, or Arduino, to switch the state of the shutter.


#3

Thanks Gadgetoid - I’ve just connected straight to a Pi and it simply works!

Andrew