Gene
New Member
I need help. I am trying to build an LED clock. I have used a 555 IC for pulses and divided them with a series if 4017 ICs such that I get a single pulse each hour. Now, the idea was to use 12 LEDs and connect them so that one comes (only one) on each hour - the next hour a different LED should come on, etc. I was planning to use a 4040 IC to link the pulse generator to the 12 LEDs but my display is erratic. At hour number 1, LED number 1 comes on (great). But in hour number 2, LED 1 and 2 come on. In hour number 3, LED 1,2, & 4 come on. Does anyone have a suggestion for wiring up a 4040 IC to display 12 pulses and continue. Thanks...