What does the project present?
Also called "Knight Rider", the presented circuit lights 4 LEDs in turn. The operation of the project is based on two ICs: LM555 and CD4017. The LM555 integrated circuit acts as an oscillator and the CD4017 as a decoder.
It is practically a circuit "with serial input and parallel output". From the "reset" all the outputs are brought to zero (off). By applying pulses (from "oscillator") to the clock input (clock or master clock to other authors), the outputs will switch one by one (on). The 100k POT potentiometer helps to change the ignition time from one LED to another.
List of required components:
1 x Electronic test board + connecting wires
1 x R1 = 1K
1 x R2 = 330 Ohms
1 x R3 = 330 Ohms
1 x R4 = 330 Ohms
1 x R5 = 330 Ohms
4 x LEDs
1 x POT = 100K
1 x C1 = 10uF
1 x C2 = 100nF
1 x LM555
1 x CD4017
1 x Terminal contact
For a better understanding of the functionality of the circuit and to achieve this assembly on the breadboard we will need electronic schemes presented below:
"Step by step wiring" variant
Abstract variant
Download the manual and the electronic diagram
To carry out this project in your own laboratory, download the manual here and electronic schema in .dsn format (TinyCAD design) by here.
Also for this application is available the following video material in which the actual operation is presented:
