help !!!

how can i operate a relay by at 89c51 micro controller by using proteus ?????

Can you program the 89c51? Do you know how to drive a relay via a basic transistor?

I ask these questions because Proteus will allow a direct drive to the relay ( impossible in the real world )

Is this just a simple project.. Or is it homework?

Signal through a triode amplifying MCU can control relay