is obtained by testing a test-key thermocouple. Substituting the parameters into Equation (1) the relation between the output voltage and temperature difference for the generator can be obtained. Figure 2 shows the simulated results of the output voltage for the energy hervesting thermoelectric generator. The results show that thermoelectric generator has an output voltage of about 0.2 mV at the temperature difference of 5 K and an output voltage of about 0.6 mV at the temperature difference of 15 K.