It's called a breadboard because it looks like a bread cutting board... 1. A red wire connects from the top red (+) line to hole 18 2. A resistor (330Ω) connects from hole 18g to hole 14g 3. The LED ...

A low pulse on this pin (below 1/3 of VCC) sets the internal flip-flop and makes the output go HIGH. When the voltage on this pin reaches 2/3 of VCC, it resets the flip-flop, and the output goes LOW.