Hey guys... and gals.
I'm trying to build a custom cable tester. I need the tester to be able to sequence output to 20 individual LED's. Now i know how to get the 4017 to cycle automatically through the use of the 555... what i don't understand is how i can get it to cycle... manually. I need to be able to switch between automatic and manual modes. I have a LAN cable tester that does it... but i haven't been able to dissect the circuit well enough to understand the process completely. I know the input to the 4017 is switched between the output of the 555 and a push button tied to a Vcc source. Is the 4017 set up to switch with every pulse of the 555 (which may output a .5-1 Hz signal)? Can the 4017 be set up this way?
Thanks in advance peoples...
I'm trying to build a custom cable tester. I need the tester to be able to sequence output to 20 individual LED's. Now i know how to get the 4017 to cycle automatically through the use of the 555... what i don't understand is how i can get it to cycle... manually. I need to be able to switch between automatic and manual modes. I have a LAN cable tester that does it... but i haven't been able to dissect the circuit well enough to understand the process completely. I know the input to the 4017 is switched between the output of the 555 and a push button tied to a Vcc source. Is the 4017 set up to switch with every pulse of the 555 (which may output a .5-1 Hz signal)? Can the 4017 be set up this way?
Thanks in advance peoples...