Bcd to 7 segment display
- 1. BCD to 7-segment display using IC 7490 and IC 7447 Gujarat Technological University Prepared By: Sanchela Maulik M. :- 14EC038 Bhatt Abhay N. :- 14EC022 B. E. (E. & C.)3rd Sem. BHGCET, Rajkot Internal Guide: Prof. Manish P. Patel Assistant Professor E & C Dept. BHGCET, Rajkot Presentation of Active Learning Assignment 1
- 2. Outline: Introduction Component List Pin Diagrams and Descriptions Circuit Diagram and Description Practical circuit References 2
- 3. Introduction: In our project, using IC7447 and IC7490 we can convert the BCD to 7 segment. This project is used in displays, entry counters, etc. When we apply 1 clock pulse at that time IC7490 generates 4bit BCD code, and it’s given to IC7447, and finally its displays in & 7-segment display.
- 4. Component list: 7 segment driver IC 7447 Decade counter IC 7490 7 segment led display common anode Resistor 330 Ω
- 5. 0 to 9 Binary Input Sequence Code:
- 6. Pin Diagrams & Description:
- 7. Pin Diagram of IC 7490:
- 8. Pin Description of IC7490: Pin No Function Name 1 Clock input 2 Input2 2 Reset1 R(0)1 3 Reset2 R(0)2 4 Not connected NC 5 Supply voltage; 5V (4.75V – 5.25V) Vcc 6 Reset3 R(9)3 7 Reset4 R(9)4 8 Output 3, BCD Output bit 2 QC 9 Output 2, BCD Output bit 1 QB 10 Ground (0V) Ground 11 Output 4, BCD Output bit 3 QD 12 Output 1, BCD Output bit 0 QA 13 Not connected NC 14 Clock input 1 Input1
- 9. Pin Diagram of IC 7447:
- 10. Pin Description of Ic7447: Pin No Function Name 1 BCD Input 2 B 2 BCD Input 3 C 3 Display test; Active low LT 4 Ripple blanking output; Active low RBO 5 Ripple blanking input; Active low RBI 6 BCD Input 4 D 7 BCD Input 1 A 8 Ground (0V) Ground 9 Segment outputs; Active low e 10 d 11 c 12 b 13 a 14 g 15 f 16 Supply voltage; 5V (4.75V – 5.25V) Vcc
- 11. Pin Diagram of 7- segment common anode display:
- 12. Types of 7-segment Display:
- 13. Connection of 7447 with 7- segment:
- 14. Pin Description of 7- segment Display:
- 15. Function of 7 segment:
- 16. Circuit Diagram:
- 17. Circuit Diagram Description: Pins R0(1), R0(2), R9(1), R9(2) connected to ground. Pins Q0, Q1, Q2, Q3 connected to the output logic indicator pins of input IC7447 at A, B, C, D. Clk B pin connected to Q0. Clk A pin connected to push button for the input signal ground. Output pins of IC7447 Qa, Qb, Qc, Qd, Qe, Qf, Qg connected to the 7- Segment Display. Apply 5 v Vcc Supply to the 7- Segment
- 19. References: www.davidswinscoe.com/electronics/c omponents www.engineersgarage.com www.electroschmetics.com www.mouser.in/embedded-solutions/ www.electronics-tutorials.ws/
- 20. 20