Sequential LED flasher by IC 4017


The following circuit is  sequential flasherwith 10 LEDs
Can change its speed by changing the value of capacitor or 33K resistor
circuit is composed of two parts, the first part IC 555 which generates a clock pulse, and the second part is IC 4017 running LEDs sequentially
Can run the circuit by 3 to 9 volts and it draw 10mA current.
470 ohm resistor used for LED protection.

Parts list:
IC4017
IC555
LEDs(10pcs)
Resistor 470 ohm
Resistor 33K
Capacitor 2.2uF
   

Sequential LED flasher by IC 4017

Sequential LED flasher by IC 4017


Location: Amarah, Iraq

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