# Help with Boolean logic function

Discussion in 'The Projects Forum' started by Beegil, Mar 16, 2009.

1. ### Beegil Thread Starter New Member

Mar 16, 2009
2
0
Im sure this is really easy but im new to this stuff!

A ventilation system uses three identical temperature sensing devices. Each produces an output equivalent to a logical 1 when the ambient temperature at that sensor rises above a certain threshold value. These devices are to be used in conjunction with a logic circuit to produce an output which will be used to turn on ventilating fans when two or more of the sensors produce a 1 output.

I need to write the logic function which defines the operation for this problem, then simplify and implement it using AND & OR gates and finally implement it using just NOR gates.

Any help would be much appreciated.

2. ### Beegil Thread Starter New Member

Mar 16, 2009
2
0
ok so ive worked at it for a bit and have simplified :

V= ABC' + AB'C + A'BC + ABC

down to:

V= AB + AC + BC

and got the circuit using AND & OR gates, but I cant work out how to implement this circuit using just NOR gates.....