i am looking for information on how to cade decade counters/ What i basically want to happen is to have 30 led's light on one at a time... and the previous one turn off. The only problem i am having is cascading the chips so that when the 10th light of the first chip turns off, the next one lights up. Any body have any ideas? I have a bunch of he cd4017be chips. Any suggestions would be a big help, thanks