Tuneable Edge Detector (KT01)
Author: mark gross
This is a more sophisticated Edge Detector robot. It's like the Basic Edge Detector, but you can "tune" it using the Knob Cubelet. You'll need a Knob and a Minimum Cubelet, which aren't in the KT06 kit.

You'll need these Cubelets. The Knob-Minimum tower
Tuneable Edge Detector