Electronics All-in-One For Dummies
Book image
Explore Book Buy On Amazon
The 555 is one of the most popular integrated circuits (ICs) ever made. When you use it, you need to be aware of the purpose of each of the eight pins in the 555 package. You may also occasionally use a 556 IC, which consists of two 555 timers in a single package, and the same applies to knowing its pinouts as well.
Function 555 Timer 556 First Timer 556 Second Timer
Ground 1 7 7
Trigger 2 6 8
Output 3 5 9
Reset 4 4 10
Control Voltage 5 3 11
Threshold 6 2 12
Discharge 7 1 13
Vcc 8 14 14

About This Article

This article is from the book:

About the book author:

Doug Lowe is the bestselling author of more than 40 For Dummies books. He's covered everything from Microsoft Office to creating web pages to technologies such as Java and ASP.NET, and has written several editions of both PowerPoint For Dummies and Networking For Dummies.

This article can be found in the category: