In my project, this section is faulty.
I'm doing a bit-banging operation with shift registers and I'm trying to make shift register data reset after 15 bits are shifted out from the micro controller. I connected the CLR lines of both 74HC164's in my project to pin 4 of the 74HC02 shown here. I know I could have used inverters but nor gates were what I had.
As I test, I notice at least a few times the reset operation on the 4024 not working. I verified this by temporarily connecting an LED from each output (one at a time) to ground through a 180 ohm resistor. Power supply is 5VDC.
I did try adding 1K pull-up resistors to the clock, reset and pin 5 of the nor gate and that did not help.
The purpose of this particular circuit is to reset the counter and shift registers (shift registers not shown) every 16 clock pulses made to the 4024.
Why is my 4024 behaving so strangely and how can I fix this?