We can see how circuits work, and represent them with some simple diagrams, using basic electrical components like these. You start with a cell, or combination of cells. These could be batteries ...

For simple circuits, it’s easy enough to grab a breadboard and start putting it together. Breadboards make it easy to check your circuit for mistakes before soldering together a finished product.

The wiring diagram and its data ... thought of inhibitory cells -- those that suppress neural activity -- as a simple force that dampens the action of other cells. However, researchers discovered ...