In this version of Gizmo, we have collected all three strategies (recording activity, inhibiting components, and stimulating components) together, and allow you to orchestrate the strategies to figure out the mechanism:

An important first strategy in modeling a phenomenon is recording the activity of the components. In this version of Gizmo, we provide a recording device (the magnifying glass) to allow for this strategy.

Try this now by clicking on the magnifying glass in the simulation below, move it over the the center post, while also making sure the left control panel button is depressed. You’ll see that the center post is on (symbolized by the value ‘TRUE’). Now do the same with the left post. In this case, the post is off (symbolized by the value ‘FALSE’). Now change the setting of the buttons on the control panel so that both the left and center button are depressed. Now when you probe the left post, it has a value of ‘TRUE’. It seems that this probe detects when there is current running through the interior post.