In this tutorial, you’ll learn how to build a 555 PWM Circuit. You’ll modify the standard astable circuit with a couple of diodes. And you’ll see how you can use this to control the speed of a motor.
In this tutorial, you’ll learn how to build a 555 police siren circuit using two 555 timer ICs.
The 555 timer is a popular integrated circuit (IC) for hobbyists and can be used for a great variety of projects. For this project, we are going to use it to create sound with a twist!
Instead of a “straight” sound, we are going to make the frequency change automatically so it ends up sounding like a wailing police siren.
The 555 timer works by using three 5 kΩ resistors to divide the supply voltage in three. Two comparators compare these voltages to the input voltage, then sets or resets a flip-flop accordingly.
Below is a diagram showing what the 555 timer looks like on the inside:
In this 555 Timer tutorial, you’ll learn how to use the 555 timer to do fun things.
One of the first things many do with it is to create a blinking light. But that’s just one simple example of the many things you can do with this chip. You can also control motors, create an alarm, create a musical instrument, and much more.