Hi everyone.
I'm experimenting with a Cd4017 for the first time these past couple of evenings.
Right now I've got it in a breadboard powered by a regulated 5v supply [7805 regulated].
I've got all the inputs tied to GND except the clock enable which I've plugged into vcc.
I've taken three arbitrary outputs and connected them to a RGB led. Each output to the led has a 1k resister in series. To protect the led.
Okay - from reading about cmos and these types of parts i know I should not have inputs floating correct, random behavior could occur. Correct?
Seems that when I've hooked up the circuit as described above, I get somewhat random output on the led. It starts flashing, which is nice but not expected since I'm not making a transition from low to high on the clock input as its plugged into vcc
From the data sheet it indicates the clock would increment only on a transition from low to high on the clock input?
Anyway I'm just trying to wrap my head around this and I know I still have some debugging to do. I just cannot seem to get it to nicely transition from one output to the next. I've tried it with a single led to eliminate the complexity [complex to me anyway] of a RGB led. I've tried a switch to toggle the clock, I've tried leaving the clock line tied high etc.
Cheers,
Fuper
I'm experimenting with a Cd4017 for the first time these past couple of evenings.
Right now I've got it in a breadboard powered by a regulated 5v supply [7805 regulated].
I've got all the inputs tied to GND except the clock enable which I've plugged into vcc.
I've taken three arbitrary outputs and connected them to a RGB led. Each output to the led has a 1k resister in series. To protect the led.
Okay - from reading about cmos and these types of parts i know I should not have inputs floating correct, random behavior could occur. Correct?
Seems that when I've hooked up the circuit as described above, I get somewhat random output on the led. It starts flashing, which is nice but not expected since I'm not making a transition from low to high on the clock input as its plugged into vcc
From the data sheet it indicates the clock would increment only on a transition from low to high on the clock input?
Anyway I'm just trying to wrap my head around this and I know I still have some debugging to do. I just cannot seem to get it to nicely transition from one output to the next. I've tried it with a single led to eliminate the complexity [complex to me anyway] of a RGB led. I've tried a switch to toggle the clock, I've tried leaving the clock line tied high etc.
Cheers,
Fuper