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Integrated circuit CD4017BE is odd cockroach. While his friends run the code, run sophisticated protocols, managers voltages and currents or at least perform logical operations fundamentalist this roach - called Decade Counter ("Counter sam tens") - just count to ten. More specifically, it has a clock entry and ten ports, numbered 0 to 9, and each time the clock input voltage increases, the Roach takes the next exit voltage, and only her. A bit like looking at only the unity digit number up and up forever. Why is this good?
In fact, there for another five Finnish -4017: Voltage (VDD) and ground (VSS) voltages of 3 to 18 volts, Voltage Reset returns the output port 0, Clock Inhibit causes sam the roach to temporarily ignore the penis input clock and Carry Out arises whenever the count goes from 9 to 0, and basically sam divides the clock signal at ten.
As you have seen the video, you can use Jockey to run over ten LED light (that is, if I bothered to organize them by numbering the ports and not by their physical location). But cockroach did not know how to count backwards, or spend more single output - that is very limited stream - or even do something interesting. Just count from 0 to 9 repeatedly. Again the question arises, who needs it? In the past, before the days of micro - controllers prices, these cockroaches were certainly used for all kinds of tasks that today can be done in a cost effective and easier. However, they are not completely unnecessary.
One option is to use -4017 as a simple indicator of the state system. It does not require much Finnish micro - controller (I still need to verify this, but you may proper programming sam only one blade) and the code could run Far from dulcet his "highlight ten different children according to each parameter we want, for debug, warning sam the user and more.
Another option is to use the output of -4017 means to control up to ten other components: whether their actual power supply (via a transistor or relay), or using Pin Enable or another. Thus it is possible to perform a simple time division between components, manage multiple memory modules sam to increase the total memory capacity of the system, and so on.
avi | 23/06/2013 at 21:30 | comment
Another bit smarter idea: use it as Motltiflks eg connectors per port button and connect them all to DIGITAL, as long as you keep the memory which port you every time you never know which button press. You can do the same with all the sensors are based all potentiometer
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