Introduction
The CD4017 is a decade counter IC that can count from 0 to 10 and is commonly used in various counting applications. In this experiment, we will implement a push button to manually control the counting of the 4017 counter. Each press of the button will advance the counter and light up the corresponding LED.
Objective
The objective of this experiment is to demonstrate how to use a push button to control the counting sequence of a CD4017 decade counter and light up corresponding LEDs.
Components Needed
- 1 x CD4017 Decade Counter IC
- 10 x LEDs (different colors)
- 10 x Resistors (220Ω for each LED)
- 1 x Push Button Switch
- 1 x Resistor (10kΩ for pull-down)
- 1 x Breadboard
- Connecting Wires
- Power Supply (5V)
Circuit Diagram
Procedure
- Connect pin 1 (GND) of the CD4017 to the ground of the power supply.
- Connect pin 11 (VCC) of the CD4017 to the positive voltage supply (5V).
- Connect the output pins (Q0 to Q9) of the CD4017 to the anodes of the LEDs. Connect the cathodes of the LEDs to ground through a 220Ω resistor.
- Connect one terminal of the push button switch to pin 14 (Clock) of the CD4017.
- Connect the other terminal of the push button switch to VCC (5V) and place a 10kΩ resistor between pin 14 and ground to act as a pull-down resistor.
- Power the circuit. Each press of the push button will advance the counter and light up the corresponding LED.
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Results
Each time the push button is pressed, the CD4017 will advance its output, lighting up the next LED in the sequence. This allows for manual control over the counting sequence of the decade counter.
Conclusion
In this experiment, we successfully implemented a push button to control the counting of a CD4017 decade counter. This setup demonstrates how to use manual inputs to interact with digital counters, which can be applied in various applications requiring user interaction.
