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A digital circuit that literally "counts" - it progresses through a sequence of states that are representative of some value. It need not count in a natural progression i.e. 1,2,3,4,5 etc. to be considered a counter (i.e. you can have different count sequences) each count value need not be of significance to other circuits (i.e. sometime it's sufficient that the counter counts to some value and then stops). Examples are Gray code, up/down counter.

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I’m trying to figure out the voltage drop and the current used by a Johnson counter from a data sheet and am feeling a little lost. In particular I’m looking at a CD4022B from TI. I’m looking at …
asked Apr 9 by CyF
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first lights so on at 0.25 sec for 0.025s and then again at 1s. I've done some rough prototyping using a 555 oscillator, a digital counter, and logic gates to hard code the timing for the shorter … a programmable logic array or FPGA to handle the logic for the counter output, but don't know enough about either to know which would work best. Ideally I want to avoid using an Arduino unless I can …
asked Feb 25 by CyF