How do i make an OR gate with universal gates?

Seven gates, they are: not, and, or, nor, nand, xor, xnor.

yes,nand gate is universal gate..because we can create NOT,OR,AND,EX-OR with the help of nand gate.

AND gate is A.B If two not gates are added at both inputs of and gate then output becomes A'.B' which is equal to (A+B)' by DeMorgan's law. hence the nor gate is formed Update: Put more simply,...

You can use a second gate on the same IC to invert the output (most OR-gate ICs I know of have 4 gates per chip). Do this by tying the output of the first gate to both inputs of the spare gate.

NOT gate is not an universal gate. NAND & NOR are called universal gates.