These pins are held low (0V/grounded) by default, but when the Clock Enable pin is made high the counting pauses. They are the Clock Enable (pin 13) and Reset (pin 15) pins. The output changes sequentially from Q0 to Q9 for every high pulse from the Clock pin, but this sequence can be interrupted by two pins. to generate our custom pulse using I/O pins.
So we need a clock source to keep this IC ticking, this clock source can be a simple Timer circuit that could generate pulse or a microcontroller like Arduino, PIC, etc. This IC will increment the count from 0 to 9 (Q0 to Q9) each time it senses a high pulse from the clock pin (pin 14). We have 10 output pins ranging from Q0 to Q9, these pins can be connected to any load but we are using LEDs here as shown in the circuit below. The IC can work from 3V to 15V, but normally powered with +5V to the Vdd/Vcc pin and the Ground/Vss pin is connected to ground. This is commonly used for Led chasers and other logical output projects, so if you are looking for an sequential decoded counting IC that can count up to 10 then this IC will be your right choice It also has the capability to indicate the status of counting using Carry pin. The IC CD4017 is used for counting applications, it has the capability to turn on 10 outputs sequentially in a pre-defined time and reset the count or hold it when required. Note: Complete Technical Details can be found in the CD4017 datasheet given at the end of this page. Available in 16-pin PDIP, GDIP, PDSO packages.Wide supply voltage range from 3V to 15V, typically +5V.The counting happens when this clock pulse goes high, this pin is normally connected to 555 timer or other uC to produce a pulseĪs the name suggests this pin resets the count back to 1Ĭonnects to the supply voltage typically +5V This is an input which when made high will hold the count at the current state
This pin goes high after the IC counts from 1 to 10. These are the 10 output pins on which the counting occurs, they are not in order hence verify pin diagram above
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