Hi guys. I'm new on the forums and new to electronics for about 2 years now. I'm having some trouble counting from 0-9 then 9-0 continuously on a 74191 counter. I understand that its a 4 bit counter and it counts to 16 so i created a glitch with a nand gate to count to 9 by teeing Qb and Qd to the nand gate. I can get the counter to count either up or down with a switch but im trying to get it count continuously with out a switch.
So basically i wanted to count up from 0-9 then back down from 9-0 and over and over again. This is where i need some help understanding.
Thank You
Schematics
CLK is coming from a 555 timer
So basically i wanted to count up from 0-9 then back down from 9-0 and over and over again. This is where i need some help understanding.
Thank You
Schematics
CLK is coming from a 555 timer