e) The power to a motor in a group conveyor system is controlled by the state of Four Sensor Switches A,B,C and D. The motor is to be switched on when:- All sensor switches are OPEN- Any one switch is CLOSED and the remaining three OPEN- B and C CLOSED, A and D OPEN- A and D CLOSED, B and C OPEN Assuming Switch closed = logic 1 and Switch open =0 Design the logic circuit to control the motor using NOR gates only [5 marks]

Practical Usage of Logic Gates Design Problem A motor car manufacturing company has manufactured a motor car protecting circuit to warn if there is a movement in the car when the engine is not on or when there is damage to a shutter. This has three sensors to detect whether the engine is on and another sensor to detect whether there is a damage to a shutter. Another sensor is there to detect whether the car is moving. This circuit is designed with three basic circuits. One of these is a NOT gate and the other two gates should be included in the empty boxes. What are the logic gates suitable for these? Draw the circuit. Practical Usage of Logic Gates Engine sensor Shutter damage alarm signal sensor Movement sensor

length of the train=Tl A) the train comes only from the right and the Tl< |X1-X0| Design the asynchronous logic circuit that enables the level crossing to work. B) the train comes from the right only and the Tl> |X1-X0| Design the asynchronous logic circuit that enables the level crossing to work. C)the train can come from both sides and the Tl<|X1-X0| Design the asynchronous logic circuit that enables the level crossing to work. D)the train can come from both sides and the Tl>|X1-X0| Design the asynchronous logic circuit that enables the level crossing to work.

Computer Science Design of ALU control circuit for maximum 4 input variables (Ainvert, Binvert , F1 and F0) using QMM