An EXOR gate is the part indicated with dotted lines in the diagram. It is composed of 11 2N2222A transistors and 10 different values of resistors. Also, 3 diodes are in the circuit. Two inputs are present labeled as A and B. the function of the circuit is summarized by the table below.
| A | B | Y |
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
The whole project is the invert of the EXOR gate which is the EXNOR gate. An inverter is added to the output of the first circuit to produce the EXNOR. A 2N2222A transistor and two resistors composed the inverter. The function of the EXNOR gate is summarized as follows:
| A | B | Y |
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |