just tap off the 4040 outputs for desired time.
the crystal time base for accurate timing **broken link removed**
just add a few gates and you have your desired results.
Hello
I want to build a counter circuit that counts large range of numbers,ie whenever it got the clock signal,it has to do the count in only up side.,So plz help me with this task,actually i want to know the suitable ICs that suits this task..,