Typical four-way signal alternate display circuit
The figure shows a typical four-way signal alternately showing the circuit diagram. The IC CD4017 in this circuit is a 5-bit Johnson calculator with 10 decoder outputs. Inside the CD4017 is a calculator with a divide of 10 and a binary pair of decimal decoding circuits. It has 16 pins, except the power supply pins VDD and VSS are power pins, the input voltage range is 3~15V, the other pins are A: frequency input pin; B: data output pin; a: Q1-Q9, The value counted, its output is Hi, and the rest is Lo potential. b: CARRY OUT (Pin12), the carry foot. D: Control pin: a.CLEAR (Pin15): Clear the foot or reset the foot. b.CLOCK ENABLE (P13), timing allows the foot.
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