Introduction
This experiment uses the NE555 timer IC in astable mode to drive a CD4017 decade counter, which lights up LEDs in a "chaser" sequence.
Materials Required
- NE555 Timer IC
- CD4017 Decade Counter IC
- LEDs
- Resistors
- Power Supply
- Breadboard and jumper wires
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Circuit Diagram
The NE555 timer is connected to the clock input of the CD4017, which sequentially lights up the LEDs connected to the output pins of the CD4017.
Steps for the Experiment
- Assemble the NE555 timer in astable mode to generate a clock pulse.
- Connect the NE555 timer output to the clock input of the CD4017.
- Connect LEDs to the output pins of the CD4017.
- Observe the LEDs lighting up sequentially in a chaser pattern.
Explanation
The NE555 timer generates clock pulses, which drive the CD4017 decade counter. The CD4017 sequentially outputs a HIGH signal on each of its output pins, lighting up the connected LEDs in a "chaser" pattern.
Results and Observations
- The LEDs should light up in sequence, one after the other, with each clock pulse from the NE555 timer.
