Using the 555 Timer

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!

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