Remember that the LED has to be the correct way around with the shorter negative lead to the right.
Although the bodies of the switches are square, the pins protrude from opposite sides of the switch. This means that the pins will only be far enough apart when they are the correct way around on the breadboard.
This guide was first published on Dec 05, 2012. It was last updated on Dec 05, 2012.
This page (Breadboard Layout) was last updated on Jul 13, 2020.