Myke Hurley, writing as a guest for Pen Addict, explores the design of the Apple Pencil in great detail.

A few highlights:

With the weights inside the Pencil, as soon as you set it down, it rolls a little and then stops itself. The weights appear to have been designed to balance it and take over. In most instances this works out great, but I have observed that if you place the Pencil down with any force, say if it is not gently put down on a desk, but maybe dropped from a few inches (I love my implements, but I use them too…), the Pencil will likely roll a couple of times in the process.

When this happens the weights actually seem to give it momentum, and will propel it forward further and faster than it would have otherwise. Each time as the Pencil turns, it acts against itself as it is moving to quickly to balance, and on it goes, off the table.

And:

Because of a combination of Bluetooth and the fact that Apple designed the Pencil and the iPad Pro to work in conjunction with each other, the iPad Pro is able to accurately distinguish the difference between the Pencil tip and any touch input.

I have been astounded by just how well this works. I can have my arm, wrist, and other hand on the screen, and the iPad Pro can distinguish the movement of the Pencil over the movement of anything else. I am thoroughly impressed by this.

I’d love to read about the actual engineering behind palm rejection.

Fascinating review. Don’t miss the samples of Myke’s handwriting. Amazing how precisely the iPad Pro and Apple Pencil allow you to mirror your natural handwriting. I wonder if apps will emerge built around this capability.