Lesson 1101: Writing Electronic Gate Digrams for Wiring
Your knowledge of digital gates can be put to use when wiring digital boards. When writing the electronic gate diagrams for wiring, there is one slight difference in the method used in the previous lesson. Instead of just drawing a wire and labeling it as the variable on the side, four lines are drawn vertically and labeled on the top as D,C,B, and A in that order. D,C,B, and A represent place values in base 2. So DCBA in base 10 would be A=10^0 B=10^1 C=10^2 D=10^3 but in this case DCBA in base 2 A=2^0 B=2^1 C=2^2 D=2^3.
Other than the difference in writing the variables, this is the only difference in drawing the electronic gate configurations. You would draw each gate with the same symbols used in the previous lesson.
This method is used to help when actually wiring, so that it is easy to tell which variables are being used.