hi i could do with just any general info on how a 555 monostable into 4017b circuit works, or uses of this circuit and the positive points and negative points
Thanks
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Sorry for what seems to be a basic question...
In many of these 4017 circuits (like Bill's in post #4), one of the outputs is connected to a Darlington pair (TIP 120) through a 10 K resistor, while many other times no resistor is used to go directly into a transistor. The 4017 outputs only seem to deliver about 10ma, so how should the resistor value calculated?