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> In Proteus A Connection Proplem, I Can't Connect Two Components
Posted: July 10, 2011 12:17 am
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I Can't Connect 74LS147 & 74LS04

Also I Can't Connect 74LS04 & 74Ls247

Here's The Circuit :


Please Help ....
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Abdullah M.A.
Posted: July 10, 2011 02:23 pm
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You can't or you do not know???


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Posted: July 10, 2011 05:54 pm
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What you can't, is to connect the input and the output of the LS04 together. This is called a shortcircuit, since the LS04 is inverting. What you try to do with the diodes and the resistor network, is also escaping me.

Putting an inverter between the 147 and 247 is correct if you want to display the numbers from 0-9. You should also be aware that the priority is fixed from 0 to 9. If you want to turn off the display you should use the 'blank' input on th LS247 to do this.

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