3bit jk synchronous counter. it counts till 5 then resets if oyuwant to remove the reset just disconnect the async reset .
circuit for a Synchronous Down – Counter circuit that counts from 1111 down to
0000. The circuit to be built using only T flip-flops
TA = QA + QB.QC.QD; TB = QC.QD; TC = QD; TD = QA'