View Single Post
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.

Barry
barry wilkins is offline   Reply With Quote