Converting a fixed DC voltage into a square wave.

[millinium]

Is there any method or existing circuit that converts a fixed DC voltage to a square wave?..I need the square wave to a clock for switching my main circuit and the only input i can use is a fixed DC voltage. Thanks for any reply.

 

[Genovator]

There are lots of ways in doing that. (You didn't mentioned the voltage, so I assume its a low voltage circuit with very less power consumption.)

Search in google for square wave oscillator..

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http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/square.html

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[millinium]

Thank for the reply sir..