Hi guys, need help with a 7-Segment display circuit

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Hi guys, need help with a 7-Segment display circuit?
Okay, so I'm studying electronic engineering and they gave us a circuit to build, but I dont know how to.
They gave us a
4xdip switch,
7-segment display,
2x (4 And gate) IC (SN74LS08N),
1x (6 Not gate inverter) IC (SN74LS04n),
1x (6 Not gate inverter) IC (HD74LS04P (Seems to be the same as the previous)),
1x (4 Positive OR gate) IC (HD74LS32P).
And then a bunch of resistors and capacitors (100 ohm resistors)

Okay, now how do i connect everything up with each other?
(I already got my 5v power set up)

Thanks in advance guys D
 

So, what kind of a circuit it is that you are trying to make?
 

Basically i have to use the switches to display different didgets on the 7 segment, I'm guessing 0-7.
Thing is they give us extra components we wont necessarily use, so I might not have to use all components.
 

Ok, got it...I think you need to be aware of the input terminals of the 7-seg display. Then you have to know the logic which will display the numbers (i.e to display 0, you need to simultaneously keep ON a, b, c, d, e, f segments). You need to know the combinational logic.
 


Yea I'm aware of the combinational logic of the 7-segment display, problem is i cant figure out how to get that logics from my 4 switches. Basically i have to get all the different combinations (0-7 on the display), and what i have is Not gate, And gates, and OR gates.

I need someone to tell me how to connect these up with each other.
Thanks for the feedback so far
 

Have a look at pages 12-21 of the pdf attached...basically they are trying to do a BCD to 7-seg conversion. Now if you have 4 no of switches, from the output of the supply add the switches and turn on (1) or off (0) to the inputs of the logic circuits to get the desired result.
 

Attachments

  • Lecture21.pdf
    1.6 MB · Views: 124

Wow okay that helps a lot so far. But is this just for the "e" connector on the 7-segment display?

- - - Updated - - -

From what you've given me i was able to find this http://www.physics.udel.edu/~watson/phys345/fall1998/class/17-decoder.html
Gonna see if i have enough gates to complete this and let you know.
Thanks a million for the help man Much appreciated.
 

yes its only the 'e' segment i'm afraid.
 

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