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counters are used in most of all digital devices like digital clock, camera, CD/DVD recorder, mobiles etc. to count sequence in the form of pulse. and many project required a counter for counting sequence according to need of project. So in this part we are going to make a Decade Counter using CD4017 IC

Let imagine you want to make a project which count how many times a switch pressed or how many people enter in room. Projects of this type are need a counter to count pulse generated by sensor or by pressing of switch. There are many type of counter based on difference aspects like decade or 4 bit counter, synchronous or asynchronous counter, Up/Down counter, so you need to choose according your project. here we go with decade counter using CD4017
CD4017 decade counter.

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