hey guys! i need help designing a 4 bit counter using jk flip flops. It has to count 0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 14, 15. The counter has unused states 2, 5, 8, 11 and a function bit to count either up or down. I am using 74LS76A Dual jk flip flops and any other combinational circuit to implement this sequential circuits. Any ideas you can give me will be appreciated. Thanks!!!
This is what i got so far. The JK flip flop can be turn into a T flip flop jumping JK together. Then I made 2 truth tables stating one for the up count and one for the down count. then I made 4 Karnaugh maps for up count and 4 for down count. The use a 2 to 1 multiplexer to switch between the up and down count. Im gonna implement it tomorrow. Any other ideas I will appreciate it. Also I have the 74LS47 BCD to seven segment decoder but I want a binary to seven segment decoder to show from 0 to 15 in the seven segment display, does anyone knows if that decoder exists???