Triboelectric nanogenerators (TENG) can convert various forms of wasted mechanical energy in our environment into useful electrical energy that can power wireless sensor nodes constituting an internet of things (IoT) application. The TENG usually generates at high voltage and low current. This is a problem when trying to power portable devices which commonly require low voltage and high current. Our goal in this work was to address this common problem and demonstrate how any TENG can be used as a practical power source. For this purpose we designed a kinematic system that can reliably drive a transformer based power circuit. Our TENG system utilizes mundane rotation energy to power a IoT sensor node. A windup spring based mechanism was used to store the input rotation energy. Then using a custom gear-train and four-nose cam, the TENG was driven at a high frequency. A power converter constituting a transformer and charge pump circuit was used to reliably power a temperature and humidity sensor node that periodically transmitted data wirelessly via bluetooth to any smart device like a laptop or mobile phone. Such a system is applicable in self-powered environment monitoring as well as in industrial control systems where maintaining specific temperature and humidity is critical.