Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
i just tried the led with a transistor , still no luck.
are you saying that the q output going back into the D input needs a transistor also? because it too is having loading issues?
what is wrong with a 555 approach?
I told you in post #8 that you needed to use a transistor to drive an LED. If you really want help, you have to pay attention!
CD4000 series devices can't drive more than a few milliamps and still maintain valid logic levels. Since the /Q output feeds back to the D input on the 4013, excessive loading on that output will cause malfunctioning.
If you give up and go back to the 555, you are passing up a good learning experience in exchange for expediency. The 555 is a Rube Goldberg solution to your problem.
If you are feeding Q back to D, that could be the cause of your problems. You need to feed Qnot back to the D input. Qnot is the Q with the bar over it.i just tried the led with a transistor , still no luck.
are you saying that the q output going back into the D input needs a transistor also? because it too is having loading issues?
what is wrong with a 555 approach?