i know any gate can convert to NAND or NOR, asked many time why people always use NAND instead of NOR, no one can answer, but i found the answer now. NAND need voltage, NOR need current.
![](https://peter.quantr.hk/wp-content/uploads/2023/07/8231C513-4A40-4076-A09D-6C211FE088BB-600x450.jpeg)
i know any gate can convert to NAND or NOR, asked many time why people always use NAND instead of NOR, no one can answer, but i found the answer now. NAND need voltage, NOR need current.