A Simple 0-9 Digital Counter Circuit Diagram

Here, in this article, we are going to see the circuit diagram for a Simple 0-9 Digital Counter. The circuit diagram is very simple and contains few components. So you can build its circuit for your electronics project. A 0-9 counter is a digital circuit that can sequentially count through the numbers 0 to 9 and repeat the cycle. Each time an input pulse is received, the counter advances to the next number. After reaching 9, it resets back to 0 and starts counting again.

A basic implementation of a 0-9 counter can be achieved using a decade counter IC, such as the CD4017 or CD4026. Here, we have used CD4026. The CD4026 is a versatile CMOS integrated circuit designed for decades and counting. The CD4026 is a 4-bit binary counter with a built-in 7-segment display driver. It can be used to count from 0 to 9 and then reset to 0. This integrated circuit has ten output pins, each corresponding to a number from 0 to 9. When a clock pulse is applied, the output pin corresponding to the current count becomes active (HIGH), while the others remain inactive (LOW). The counter advances with each clock pulse.

Circuit Diagram

Here, you can see the circuit diagram of a Simple 0-9 Digital Counter using IC CD4026, Seven Segment Display, and other electronic components.

Component List

• IC CD4026 - 1 PCs
• Seven Segment Display - 1 PCs
• 1 Kilo-ohm Resistor - 2 PCs
• 220 Ohm Resistor - 1 PCs
• 22uF Capacitor - 1 PCs
• NO(Normally Open) Push Button Switch - 2 PCs

Connection Procedure

1. Connect the seven-segment display to the IC CD4026. The seven-segment display has pins named as a, b, ...g. Similarly, the IC also has pins named as OutA, OutB, .....OutG. So connect them with the same name matched. Connect the common or ground terminal of the display to the negative terminal of the power source in series with a 220 Ohm Resistor. Here, we have connected the DP terminal to the positive terminal of the power source to indicate when the power supply is available. You can keep it unconnected also.
2. Connect the Count Button in series with a 1 kilo-ohm Resistor across the power supply. And connect the middle joint of that switch and resistor to the Clock Terminal(pin 1) of the IC.
3. Also, connect the 22uF capacitor between that middle joint and the negative terminal of the power source.
4. Now, connect the Reset Button in series with a 1 kilo-ohm Resistor across the power supply. And connect the middle joint of that switch and resistor to the Reset Terminal(Pin 15) of the IC.

Operation and Working Principle

When we press the Count button the counter shows the next number. Each press will make an increment by 1. Once it reaches 9, it resets back to 0 and starts counting again.

When we press the Reset button, the counting or number shown on the display resets back to 0. For, example if the display shows the number 5 and we press the Reset button, the display will show the number 0. Now if we pressed the Count button the counter will start counting from 0 only.

The working principle is very simple when we press the count switch, a clock pulse is applied and the output pin corresponding to the current count becomes active (HIGH), while the others remain inactive (LOW) so the display shows the respective number. Thus the counter advances with each clock pulse.

Read Also: 

• LED Chaser Circuit Diagram and Connection using IC 555
• Four(4) Way Traffic Light Control Circuit Diagram and Connection
• Battery Status Level Indicator Circuit Diagram (For 3V-12V Battery)
• A Simple Flasher Light Circuit Diagram (Using IC 555)
• A Simple Timer Circuit Diagram with IC 555

Thank you for visiting the Website. Keep visiting for more Updates.