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Old 01-11-2021, 04:54 AM   #3
barry wilkins
Senior Member
Join Date: Aug 2009
City & State: Maidstone Kent
Posts: 164
Default Re: 4017 counter reset problem

Hi not able to get multisim to work at the moment .
Soon as the weather improves I will first check the pusles that come out of the alarm with one of my scopes, sure that it was 5 pulses certainley an odd number which is causing the hazard light to stay on .If you set the alarm twice it cures the flashing problem.
At the moment I am testing the counter indoors using a 555 monostable with a run down control, think that might be my problem the clock is not stopping at the correct time.
So I am thinking of a redesign of the 555 circuit ,idealy it would be best if the reset from the counter stopped the clock pulses from the oscillator circuit.

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