• on Education & Information
  • Published in issue 5/2008 on page 75
About the article

Symmetrical square wave

design tip

Just about anyone must be familiar with the NE555 by now. It is one of the most common components in do-it-yourself circuits. This IC, however, was not designed specifically to generate a clock signal, and certainly not one with a duty-cycle of 50%, although it is frequently used for that.

There are of course a number of circuit possibilities that could realise a duty ratio of 50%.

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