Calculator / 7-segment LED
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boscostudents
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 Posted: Thu Jun 04, 2009 5:57 pm Post subject: Calculator / 7-segment LED |
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Hey guys,
Me and my friend need ot write this program for my tech class.
We need to make a graphical calculator and when the user does a calculation it should display the result in 2 7 segments LED lights.
We are able to make the calculator, and we set up a 7- segment LED light with an 74LS47 chip in the bread box. Is there a way to somehow attach 2 7 segemtns LED chips to 1 74LS47? Because right now our answer can only be 1 number.
So far we tried taking the result and spillting the 2 numbers, which we managed to do, and then we wanted to send each number through a different 74SL47 chip, but we do not know how to set up the program so that for example parallel inputs 2-5 send signals to one 74SL47 chip attached to a 7 segment LED, and then 6-9 into the other.
Please help us, this is very furstrating and it is due very soon!!!!!!!!! If we do not do this we might fail  ...
(ps: we use turing 4.0) |
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Tony
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boscostudents
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| Posted: Thu Jun 04, 2009 7:05 pm Post subject: RE:Calculator / 7-segment LED |
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| the onyl comand we know for it is parallelput (number), and wouldnt that just use all of the 8 inputs? is there a way to say, if this variable is 1 or 0 then the first parallel input should be high or off, and so forth for the next ones. |
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