Tearing Down a Bistable Cholesteric Display I recently dug out my bistable cholesteric display and decided to see how it works after being inspired by Big Clive's teardown. This nifty gadget, which allows you to write and erase with just a button, operates on bistable cholesteric crystals without needing constant power. Measuring the clear voltage showed around 30V, and a little experimentation confirmed its dependency on polarity. Despite a minor spark mishap, it's still a neat, low-power device. If you're interested, you can grab one from AliExpress for some hands-on fun. 12 August 2025