I am attempting to make a 4 bit computer with transistors. I've made a half-adder without too much trouble, but now I'm trying to incorporate the AND gate's output (the carry) into the next adder. This is the schematic I'm using for my AND gate:
This isn't exactly how it looks (for one thing, mine has resistors), but this is basically it.
Using this, I know that if the LED is on, both switches are pressed. yay. But now I want to do something with that information. I'm at a loss for how to do this.
In a different gate where the output is after everything else in the gate (ie OR gate), I would just replace the LED with a wire that connects to the input of the next gate. I can't do that here because the output of the AND gate depends on the rest of the circuit.
Am I doing something wrong?
Thanks for the help.