Learn how to use the classic 555 timer and build some simple projects with it.

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Today we are looking at one of the most famous and useful integrated circuits ever produced - the 555 timer IC. Although this tiny device is over 50 years old it is still in use today, and for many applications, it is a better choice than using a microcontroller.

I’ll explain how the 555 works and how to use it in its three different modes - Astable, Monostable, and Bistable.

We’ll then build some simple, but useful, projects using the 555 timer, including a light chaser and a DC motor controller. They are easy to build and, unlike a microcontroller, don’t require any programming.

In fact, there are a lot of situations where the 555 is a better choice than a microcontroller, especially when you consider how inexpensive and easy to use it is.

Here is the Table of Contents for today's video:

00:00 - Introduction
01:40 - 555 Timer Operation
10:28 - Astable Mode
15:09 - Monostable Mode
19:14 - Bistable Mode
23:12 - Light Chaser
28:15 - Latching Switch
30:39 - DC Motor Controller
34:36 - Touch Switch
37:20 - Servo Motor Tester
40:03 - Conclusion

If you’ve already used a 555 then you’re probably aware just how versatile it is. If you’ve never used one, then hopefully this video and article will inspire you to build a few projects with it. Hope you enjoy it!