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Old 23rd December 2004, 04:38 PM   #21
gmarsh is offline gmarsh  Canada
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I'd use a 555 timer, followed by a 74HC74 flip flop doing a divide-by-two to fix the duty at 50%.

Run the flip flop output through a large electrolytic (100uF or so) and then into a divider-connected potentiometer to act as your output level control.

If you want to generate other stuff (sine, etc) then the MAX038 chip is excellent.
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Old 30th December 2004, 05:47 PM   #22
Rahul is offline Rahul  India
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Hi!

One chip solution use CD4047 with RC osc .

Regards

Rahul
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