SN74LS08N and SN74LS05N doesn't work?

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a complete newbie question here: i've got logic gates texas instruments , understand why left circuit doesn't work while right 1 works (and.jpg) , why not-gate doesn't work @ (not.jpg).

here datasheets:

show image of wiring.


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Arduino Forum > Using Arduino > General Electronics > SN74LS08N and SN74LS05N doesn't work?


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