# 555 Timer in ASTABLE Mode - a Tutorial With Theory, Schematic, & Lab Sections

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## Introduction: 555 Timer in ASTABLE Mode - a Tutorial With Theory, Schematic, & Lab Sections

Hi all!!!
This is my fourth of many electronic block tutorials for my upcoming electronics learning board.  This video demonstrates the Astable (RC Square Wave Oscillator) function of the 555 timer.  The purpose of this video is to teach you how to create the circuit, determine output frequency based on external resistor-capacitor values, and how to connect it all on a breadboard.

This circuit is paramount when learning basic electronics.  The 555 timer has many uses, but this is likely the most popular.  When in school, I always used these to clock my projects.  If you follow along, you can do!

My electronic learning boards have many functions that are broken down into blocks.  Each block have a dedicated tutorial video that offers circuit diagrams, theory, and lab sections.  Once the board is complete, the user is encouraged to watch these videos before actually creating the circuit on the board.  This way, they aren't just following instructions.  After watching the videos, they should be able to understand how the circuits are working based on the interfacing of the blocks.

A 555 timer costs next to nothing, and can be found in any electronics store.  They can also be purchased in bulk over ebay for pennies a piece!

Pre-Order Our Multi-Project Electronics Learning Board Here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=181182203711&ssPageName=STRK:MESE:IT

My first three block videos:
More on the way, so stay tuned, and thanks for watching!

Warm regards,
Patrick Mitchell
Engineeringshock Electronics
http://www.engineeringshock.com
http://www.electroniclessons.com

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