Creating a NAND Gates Circuit to Light an LED

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jumphigh
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Hey all,

How can I draw a diagram of some logic circuit that will light an LED if either or both the left
and right door of a car are open and if the driver is seated ?

Assume that the doors and seat are equipped with switches, and that only NAND gates are available. ( My circuit should also be as simple as possible).

Im kinda lost in what I have to do, any words of wisdom?

Thanks
 
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Try drawing it first with whatever gates you want. You should be able to convert everything to NAND gates after.
 
vk6kro said:
Yes, you can do that.

Have a look at this article in Wikipedia about making other gates from NAND gates.

http://en.wikipedia.org/wiki/NAND_logic

Thanks all,

Is the driver`s condition (seated or unseated ) considered as the third input?
I mean, the first input is right door, the second input is the left door, and the third input is the driver?
 
jumphigh said:
Thanks all,

Is the driver`s condition (seated or unseated ) considered as the third input?
I mean, the first input is right door, the second input is the left door, and the third input is the driver?

Yes, all 3 inputs need to go into your circuit.