Description
The CD4017 Decade Counter IC is a popular 16-pin CMOS counter/divider IC used in LED chaser circuits, digital counters, sequential switching, timer circuits, clock division, automation projects and electronics learning.
This IC has 10 decoded output pins, which turn ON one by one with every clock pulse. It is commonly used with a 555 timer IC to make LED running light, LED chaser, police light, decorative lighting and digital sequence circuits.
CD4017 Decade Counter IC একটি জনপ্রিয় CMOS counter/divider IC, যা LED chaser, digital counter, sequential switching, timer circuit, clock divider এবং electronics project-এ ব্যবহার করা হয়। Clock pulse দিলে IC-এর output pins একটির পর একটি ON হয়, তাই LED running light বা sequence control circuit বানাতে এটি খুবই useful।
Product Highlights / প্রধান বৈশিষ্ট্য
✅ 16-pin CMOS decade counter IC
✅ Provides 10 decoded outputs: Q0 to Q9
✅ Counts clock pulses sequentially
✅ Commonly used with NE555 timer IC
✅ Suitable for LED chaser and running light circuits
✅ Can work as a counter and frequency divider
✅ Reset pin available for custom counting sequence
✅ Clock enable / inhibit pin available
✅ Low power CMOS design
✅ Ideal for beginner electronics and digital logic projects
Applications / ব্যবহার ক্ষেত্র
• LED chaser circuit
• Running LED light project
• Sequential LED switching
• 555 timer based counter circuit
• Digital counter project
• Clock divider circuit
• Traffic light project
• Decorative light controller
• Sequential relay control
• Robotics and automation logic circuit
• Digital electronics learning project
• School, college and university electronics project
Package Includes / প্যাকেজে যা থাকছে
✅ 1 × CD4017 Decade Counter IC – 16 Pin
Technical Specifications / স্পেসিফিকেশন
• Product Type: Decade Counter / Divider IC
• IC Number: CD4017
• Logic Family: CMOS
• Package Type: DIP-16
• Number of Pins: 16 Pins
• Output Count: 10 decoded outputs
• Output Pins: Q0 to Q9
• Clock Input: Available
• Reset Pin: Available
• Clock Enable / Inhibit Pin: Available
• Carry Out Pin: Available
• Operating Voltage: Commonly 3V to 15V DC depending on circuit/design
• Recommended Use: LED chaser, counter, timer, divider and digital logic projects
Pin Description / পিন পরিচিতি
• Pin 1: Q5 Output
• Pin 2: Q1 Output
• Pin 3: Q0 Output
• Pin 4: Q2 Output
• Pin 5: Q6 Output
• Pin 6: Q7 Output
• Pin 7: Q3 Output
• Pin 8: VSS / GND
• Pin 9: Q8 Output
• Pin 10: Q4 Output
• Pin 11: Q9 Output
• Pin 12: Carry Out
• Pin 13: Clock Enable / Inhibit
• Pin 14: Clock Input
• Pin 15: Reset
• Pin 16: VDD / Positive Supply
How It Works / কীভাবে কাজ করে
The CD4017 receives clock pulses through its clock input pin. With each clock pulse, the active output moves from Q0 to Q9 one step at a time. After Q9, the sequence returns back to Q0.
CD4017 IC clock input pin থেকে pulse গ্রহণ করে। প্রতিটি pulse-এর সাথে output Q0 থেকে Q9 পর্যন্ত একটির পর একটি active হয়। Q9 শেষ হলে আবার Q0 থেকে sequence শুরু হয়।
For example, when used with a 555 timer, the 555 IC generates clock pulses and the CD4017 uses those pulses to turn LEDs ON one by one.
Common Circuit Use / সাধারণ ব্যবহার
A very common project is:
NE555 Timer + CD4017 Counter IC = LED Chaser Circuit
In this circuit:
• NE555 creates clock pulse
• CD4017 receives the pulse
• CD4017 turns ON outputs Q0 to Q9 sequentially
• LEDs connected to outputs blink one after another
এই circuit দিয়ে LED running light, decorative light, police light এবং sequential indicator project বানানো যায়।
Important Notes / গুরুত্বপূর্ণ নোট
⚠️ Always check IC pin direction before inserting into breadboard or IC socket.
⚠️ Use proper current-limiting resistors with LEDs.
⚠️ Do not connect high-power loads directly to IC output pins.
⚠️ Use transistor, MOSFET or relay driver circuit for higher load control.
⚠️ Keep unused inputs properly connected according to circuit requirement.
⚠️ Use regulated DC power supply for stable operation.
⚠️ IC marking, brand and manufacturer may vary depending on stock batch.
⚠️ This is an electronic IC component only; breadboard, LEDs and resistors are not included unless mentioned separately.
Why Choose CD4017 IC?
The CD4017 Decade Counter IC is one of the easiest and most useful ICs for learning digital electronics. It is perfect for beginners who want to make LED chaser circuits, clock-based output sequences, timer projects and simple automation logic.
CD4017 IC digital electronics শেখার জন্য খুবই popular এবং সহজ একটি IC। LED chaser, timer based circuit, sequence control এবং digital logic project-এর জন্য এটি একটি practical component।
Frequently Asked Questions / FAQ
What is CD4017 IC used for?
CD4017 is used for decade counting, sequential output switching, LED chaser circuits, clock divider circuits and digital electronics projects.
How many outputs does CD4017 have?
It has 10 decoded outputs, usually marked as Q0 to Q9.
Can I use CD4017 with 555 timer IC?
Yes. CD4017 is commonly used with NE555 timer IC to create LED chaser and running light circuits.
Is CD4017 a microcontroller?
No. CD4017 is a CMOS counter/divider IC, not a programmable microcontroller.
Can CD4017 drive LEDs directly?
Yes, small LEDs can be driven with proper current-limiting resistors. For higher loads, use a transistor or driver circuit.
Can I use it for relay control?
Yes, but do not drive relay directly from the IC. Use a transistor or relay driver circuit.
What is the package type?
This is commonly available in DIP-16 package, suitable for breadboard and PCB use.
