I am attempting to build an XOR gate with NAND ICs. This schematic
is how I am wiring up the IC (I know the schematic is a little confusing but I tried to construct it best I can).
I am attempting to recreate this logic circuit: http://i42.tinypic.com/n4weo6.jpg
Data sheet for CD4011B IC: http://www.ti.com/lit/ds/symlink/cd4011b.pdf
It is not operating as expected, the LED is always on when I expect it to be off by default, off when both switches are pressed and only on when one or the other switch is pressed.
Have I wired this circuit incorrectly? Can anybody tell me where I have gone wrong?