BCD S EVEN SEGMENT D ECODER. I NTRODUCTION  A Decoder IC, is a device which converts one digital format into another and the most commonly used device.

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Presentation transcript:

BCD S EVEN SEGMENT D ECODER

I NTRODUCTION  A Decoder IC, is a device which converts one digital format into another and the most commonly used device for doing this is the Binary Coded Decimal (BCD) to 7- Segment Display Decoder.

BCD SEVEN SEGMENT D ECODER

S EVEN SEGMENT LED DISPLAY  A standard 7-segment LED display generally has 8 input connections.  Some single displays have an additional input pin for the decimal point in their lower right or left hand corner.

T YPES OF SEVEN SEGMENT LED DISPLAY Common Cathode Display (CCD)  In the common cathode display, all the cathode connections of the LED's are joined together to logic "0" and the individual segments are illuminated by application of a "HIGH", logic "1" signal to the individual Anode terminals.

CCD AND CAD

Common Anode Display (CAD)  In the common anode display, all the anode connections of the LED's are joined together to logic "1" and the individual segments are illuminated by connecting the individual Cathode terminals to a "LOW", logic "0" signal. T YPES OF SEVEN SEGMENT LED DISPLAY

S EVEN SEGMENT D ISPLAY F ORMAT

4511 S EVEN SEGMENT DISPLAY  The 4511 is designed to drive a common cathode display and won't work with a common anode display.  The 0.56 in. 7-segment display common cathode available from Rapid works well as part of a prototype board circuit.

P IN DETAILS OF 4511 S EVEN SEGMENT DISPLAY

4511 S EVEN SEGMENT DISPLAY SETUP OUTPUT TRUTH TABLE BCD InputsSegment Output Display DCBAabcdefg

4511 S EVEN SEGMENT DISPLAY SETUP OUTPUT TRUTH TABLE BCD InputsSegment Output Display DCBAabcdefg

BCD SEVEN SEGMENT DECODER CIRCUIT

C ONT.,  To build this circuit follow the prototype board layout from the 4510 Beastie Zone web page and then add the 4511 with connections to a third prototype board.

BCD SEVEN SEGMENT DECODER TEST CIRCUIT

T HE E ND ……. Thank You …….