Does this circuit have a counting sequence of : 000, 001, 011, 111 ?
N Thread Starter nyasha Joined Mar 23, 2009 90 Oct 26, 2010 #1 Does this circuit have a counting sequence of : 000, 001, 011, 111 ? Attachments IMG (1).pdf 669.8 KB Views: 28
thatoneguy Joined Feb 19, 2009 6,359 Oct 26, 2010 #2 If the 3rd output is from Q (instead of !Q used for input back to 1st FF), It will not count as you anticipate. "Correct" binary counting is 000, 001, 010, 011, 100, 101, 110, 111 <rollback to zero> This is counting from 0 to 7 with 3 bits. There is a chapter in the e-book here that covers this exact problem. Do you have Logisim or other logic simulation software? It is free and can come in handy for these type of problems.
If the 3rd output is from Q (instead of !Q used for input back to 1st FF), It will not count as you anticipate. "Correct" binary counting is 000, 001, 010, 011, 100, 101, 110, 111 <rollback to zero> This is counting from 0 to 7 with 3 bits. There is a chapter in the e-book here that covers this exact problem. Do you have Logisim or other logic simulation software? It is free and can come in handy for these type of problems.