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Old 10th March 2004, 11:52 PM   (permalink)
Default 7 segment digital display

I am a senior in highschool. I an assignment to design a circuit on a breadboard using a 74LS47 chip,7 segment digital display, 4 switches and any necessary resistors. The problem is that I (1) don't the function of the chip, (2) I don't know the pins on the chip and (3) have no clue as to where the wires are suppose to go to display 1-10-86 (dashes included). Please Help
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Old 11th March 2004, 04:37 PM   (permalink)
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The best thing to do is go to google and put in 74LS47. Take a look at the web pages and PDF files.

They will help get you started.

Let us know how thing go

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Old 12th March 2004, 12:12 AM   (permalink)
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here the datasheet, it gives all the info you need abou the pins
http://www.ee.washington.edu/stores/...4ls/74ls47.pdf

abcd are your 4 switches, i'm not sure what you wan to display
on a 7 seg, with a chip like that yoou can't display -
do you wan tto display them all at the same time or what, caus eif you do you'll need a display for each digit

how the chip works is it reads in the data to display in binary
eg switch ab off and cd off =0011 in binary which is 3

there a 7 bits to the display labelled a-g,
to disply 3 it needs to switch on bit a,b,c,d,g
see page 3 of the datasheet
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