This is the first part of a tutorial (self, 2, 3) about modeling logic gates in MS Excel 2003. This first model will include no delay or loading for the gates. The following type of gates will be described: inverter, AND, NAND, OR, NOR, XOR (exclusive or) and XNOR. The tutorial will have several parts and the last part will build up to a more complex and accurate model including effects such as: power supply voltage, output impedance and input capacitance (from which low pass fillter effects will be derived within the model). This is not an introduction to digital electronics. The reader should get somewhat familiar with the topic before attempting to build the models described here.