Considering that more than 60 % of energy produced is wasted as heat, new methods for harvesting energy is important for the future. The Thermo_Print Project researches the amount of energy that the body produces in a heat flux. When we can measure the flux we can use it as a signal to drive processes. In the future pacemakers and other devices might be driven by the body itself. The Thermo_Print Project utilizes the Seebeck effect, together with negative feedback loops to drive small systems. The motivation for this project is to control small motors, like a small fan, LED-lights amongst some, in an art installation, where the prime mover is the person in the installation. The purpose and goal is to instigate a discussion around the boarders of human and machine.