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mod 60 counter with start/stop and reset button
Posted: Wed Dec 21, 2011 12:12 pm
by NewGeek
I need help in this. The circuit is done using a Multisim file. When S is pressed, it will start to count from 00 to 59. When S is pressed again, it will pause the counting while R will reset it to 00. Problem is why the counter cannot count again after reaching 00 and I must press S to start it again? Is there any modification or additional logic gates to be added?
Re: mod 60 counter with start/stop and reset button
Posted: Wed Jan 11, 2012 1:49 pm
by Thomas W
What does the text say on the pins of 74LS93N?
Re: mod 60 counter with start/stop and reset button
Posted: Thu Jan 12, 2012 3:07 pm
by NewGeek
Here is where each pins are connected on the 74ls93.
Pin 1- CP1
Pin 2- Master Reset
Pin 3- Master Reset
Pin 5- VCC
Pin 8- Q2
Pin 9- Q1
Pin 10- Ground
Pin 11- Q3
Pin 12- Q0
Pin 14- CP0
Pins 4,6,7 and 13 are not connected.
Re: mod 60 counter with start/stop and reset button
Posted: Sun Jan 15, 2012 12:15 pm
by Thomas W
I would like to see a zoomed in version of the schematic, so that the text on the 74LS93N is readable?
Re: mod 60 counter with start/stop and reset button
Posted: Wed Jun 12, 2013 2:11 pm
by spnrajan
NewGeek wrote:I need help in this. The circuit is done using a Multisim file. When S is pressed, it will start to count from 00 to 59. When S is pressed again, it will pause the counting while R will reset it to 00. Problem is why the counter cannot count again after reaching 00 and I must press S to start it again? Is there any modification or additional logic gates to be added?
Re: mod 60 counter with start/stop and reset button
Posted: Wed Jun 12, 2013 5:28 pm
by piratepaul
Off the top of my head, I have not looked up the numbers... surely 00 must have a logic, so if you include another chip which outputs a 1 when and only when its input is that logic and feed it back to S ... it will work... hmmm off the top[ of my head!.