Here is a schematic of the circuit I am working on.
My problem is this. When i push the button to advance the display it only goes 2, 3, 5, 6, 8 sometimes a 0. Why and what can I do to fix it.
Also I wanted to see it count by itself so I hooked up a 4047 set it in astable mode Shouldnt this provide the 7490 with a clock signal to advance the display or is that something different??? I have a picture of how the 4047 was wired up. although a fairly crude drawing. and my schematic of the circuit I have built
My problem is this. When i push the button to advance the display it only goes 2, 3, 5, 6, 8 sometimes a 0. Why and what can I do to fix it.
Also I wanted to see it count by itself so I hooked up a 4047 set it in astable mode Shouldnt this provide the 7490 with a clock signal to advance the display or is that something different??? I have a picture of how the 4047 was wired up. although a fairly crude drawing. and my schematic of the circuit I have built