Why NAND gate is called universal gate? Draw the diagram to convert NAND gate alone into OR gate.

Dear Student ,
The NAND gate can be said as an Universal Gate since combinations of them can be used to accomplish any of the basic operations and thus can produce an inverter an OR gate and AND gate .

https://www.meritnation.com/ask-answer/question/why-nand-or-nor-gates-are-called-universal-gate/semiconductor-electronics-materials-devices-and-simple-circu/7042904
Here is a link which will help you to get the answer .
https://www.meritnation.com/ask-answer/question/discuss-how-or-gate-is-realised-from-the-nand-gate/physics/9856033

Regards

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