The LTC3108 is a highly integrated DC/DC converter and power manager. It can harvest and manage surplus energy from extremely low input voltage sources such as TEG (thermoelectric generators), thermopiles, and even small solar cells. The circuit shown here uses a small step-up transformer to boost the input voltage source to an LTC3108 which then provides a complete power management solution for wireless sensing and data acquisition. It can harvest small temperature differences and generate system power instead of using traditional battery power.