Hey!

I want to build a counter with 3outputs using these gates + wires
AND, NOT, OR, XOR, FLIP-FLOP & Timers ive also got taps (tap = 1input 2 outputs)

Basicly what i want to do is have it count down (binary so 1, 2, 4, 8, 16)
Ive been having trubbles with this for ages, not even gotten near a solution.

So i want to give it a value of 8 then it ticks the first output 8times (when it reaches 0 it should stop.

Further explantion can be given but im so tired so i can hardly think atm

1) you'll need 3 flip flops to save 8 states
2) I would use the same clock for all flip-flops. if you build your counter with stuff like "using the output of a flip-flop for the clock at another flip-flop", it gets complicated and you can also run into timing problems
3) thus build a truth table... should be easy for your counter
4) build the KV-diagram to reduce the amount of gates: http://en.wikipedia.org/wiki/Karnaugh_map (if you want to reduce the amount...)
5) if you want you can also avoid the "and", "not", "or" gates... its possible to build the complete logic with just "xor"-gates (you need flipflops and the timer and the taps ofc... however you can also build those with the "xor" gates )

Thanks!
Will try it l8 =)
I might post results if i remember to do so ^^

But thanks!