Saturday, October 9, 2010

CrazyEngineers Forum - Electrical & Electronics Engineering

CrazyEngineers Forum - Electrical & Electronics Engineering

1 Hz square wave generator

Posted: 08 Oct 2010 01:46 PM PDT

Hi all,
I am making a Digital Clock. For this purpose, I need a 1 Hz signal to insert as a Clock for 'Seconds' portion of my circuit. How to create 1 Hz ? I tried 555 timer, but practically I am not getting exact 1Hz. Now I decide to make Crystal Oscillator. I have a 32.768 kHz Quartz Crystal. I have searched Internet for making the circuit. But I cannot simulate anyone of them in 'Proteus ISIS'. I want to have this 32.768kHz and then divide it using Counter(s) to have exact 1Hz signal. Now what to do? Anyone please help me with making the Crystal Oscillator Circuit and needed formulae.
Thanks.
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