Limit reminding spiral circuit composed of sixty LEDs

Published:2011/5/20 2:18:00 Author:Christina | Keyword: Limit reminding, spiral circuit, sixty LEDs | From:SeekIC

The sixty LEDs are arranged in spiral form on the display board; the connecting line connects to two 4017 ICs with the matrix form. So when the IC2 and IC1 count respectively, every light emitting diode turns on as the permutation order. The IC3 is the square wave oscillator, the frequency depends on the R2 and C1's values, the output of it is used as the IC1's clock, when IC1's count is 10, it will output a carry output as the IC2's clock. When the count is 60, IC1 and IC2 are all reset to zero, the new cycle starts. Both two integrated circuits have the limited flow function.



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