Answer by Trevor_G for Power-on Reset for CD4017 gives unexpected results
There are three issues with this circuit.The RC time constant of the reset circuit is just under half the cycle time of the 555, which, because of issue #2, is clocking the counter almost as soon as it...
View ArticleAnswer by Spehro Pefhany for Power-on Reset for CD4017 gives unexpected results
The 4017 is clocked on the rising edge, and you have the clock line high when it comes out of reset.Try connecting clock in to Vdd and the 555 output to inhibit in. Inhibit is just an inverted clock...
View ArticlePower-on Reset for CD4017 gives unexpected results
In the circuit below, a 555 timer produces approximately 1 pulse per second, and the CD4017 counts pulses. The initial state of a CD4017 is undefined, thus I need a reset pulse on power up. In the...
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