Their circuit looks like this:
To make things a little clearer, I’ve simplified the diagram to this:
The only difference is they left out the power switch, the 100K resistor, and the 68K resistor. They also used my picture—but it’s a little different too. Here’s the picture I shot:
Here’s the picture from their page:
They Photoshoped out the 100K resistor, and the 68K resistor, but left everything else as is.