The first lab of the course is testing the layout of our solderless breadboards. We proceed by measuring the resistance between various contacts.
Across a row, resistance is small but nonzero.
Resistance is zero across rows on either side of the breadboard, as well
as between adjacent rows and between rows and the side rails.
There is a small resistance between contacts along a rail,
but not between two rails.
Summary
Lack of resistance indicates an open circuit and small resistance a closed circuit. The measurements show that the breadboard is laid out in a fashion ideal for the construction of circuits. Contacts within a row are joined, allowing each row to act as a node. Adjacent rows are separated, allowing devices to sit between them. Each rail has common contacts but is separate from the others, ideal for accessing a connected voltage source and ground or even input and output signals.
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