I've been stuck on this and don't know what to do.
I'm trying to make a counter chip (74193) cycle either up or down from 0 - 9, showing the output with a 7 segment display.
This counter chip has 4 outputs, so it will count from 0 -15.
When counting up, I can make it work properly. When it gets to 10 AKA 1010, I have it set up so that the outputs go into an AND gate, and the output of the AND gate goes into the clear pin on the counter.
So when it gets to 9, the counter clears back to zero.
However, counting down, I can't make it work properly, I know I'm supposed to use the "load" pin, but I don't know in what manner. I took the number 15 AKA 1111 and AND'd those together and ran the output to the load pin, but it doesn't work.
Can anyone please help me with this?
I'm trying to make a counter chip (74193) cycle either up or down from 0 - 9, showing the output with a 7 segment display.
This counter chip has 4 outputs, so it will count from 0 -15.
When counting up, I can make it work properly. When it gets to 10 AKA 1010, I have it set up so that the outputs go into an AND gate, and the output of the AND gate goes into the clear pin on the counter.
So when it gets to 9, the counter clears back to zero.
However, counting down, I can't make it work properly, I know I'm supposed to use the "load" pin, but I don't know in what manner. I took the number 15 AKA 1111 and AND'd those together and ran the output to the load pin, but it doesn't work.
Can anyone please help me with this?