Hello again.
We decided to go with the 74LS192. But now we can't get it to work.
We have connected it like this:
Pins:
1, 9, 10, 12, 13, 14, 15 : nothing
2, 3, 6 & 7: BCD to 7 segment converter (74LS47)
4: Up counter button
5: Down counter button
8: Ground
11: Positive input
16: Positive input
Is this correct?
Also do i read the datasheet correctly, in thinking that the digital output goes one up or down every time one of the button inputs changes from high to low voltage? And that the other button input has to be on high when this change occurs?
Also if it needs to be done like just mentioned i have another question.
We have a button with a spring in it, so that when you push it down it closes the circuit, and then when u lift the finger it breaks the connection. But if we need the other input to be on positive we need the buttons to break the connection rather than closing it. Is it possible to do this with the buttons we have? Or do we need to get some buttons that break the circuit when pressed? And if so, what are they called?