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How to connect using 7447N to 7 segment display?

7-SEGMENT DISPLAY EXAMPLE WITH CODE using pic18f4520 MPLAB IDE

 

Hope this will help you.......

 

http://pic18forstudents.co.uk/

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Message 11 of 24
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try this ckt

Ed

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Message 12 of 24
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hi i am new to NI

i dont understand why my 7-segment display light uo even though i power supply is provided,

pls dont change basic gates circuitry

 

 

thks

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Message 13 of 24
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You need a command anode (CA) display since the common is connected to VCC. Using a common cathode (CK) basically reverse biases the LEDs so they won't light.

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Message 14 of 24
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That is correct.

Replac3e the common cathode (CK) with a coommon anode (CA) display.

Ed

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Message 15 of 24
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hi,

i tried replacing but did not light up.and got simulatiion error and i sther any way stick using common cathode display as it is the requirement of the system and the digital circuitry is such that it matches the 7 segment common cathode display.

thks a lot

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Message 16 of 24
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`how to remain using common cathode 7 seven segment display

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Message 17 of 24
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I changed the analog groung to digital ground, and i added a Common Anode 7 segment display.

The display now works.

What is the logic circuit supposed to do?

What are the 3 switches supposed to control?

Check your logic and your wiring.

Ed

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Message 18 of 24
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Try this one

Ed

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Message 19 of 24
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Here is your ckt with a CK display.

If any segments flicker while simulating, STOP the simulation and then START it again.

The circuit still puzzles me. The output display still look like nonsense. Min 0 generates a 6; min 1 generates an upper case E.

Very strange outputs. What is this an exercise? The circuit doesn't seem to do anything logical. Am I missing something?

Ed

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Message 20 of 24
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