temperature ranges this produced a magnetic field cycled over a very wide and imprecise range of temperature and time variance that is inconsistent at best accordingly exemplary embodiments described herein may incorporate adequate safety features while retaining the ability to specifically tailor and program preset parameter ranges exemplary embodiments may be controlled in real time or semi real time with electronic logic devices to meet varying applications with a single or multiple circuit board design exemplary embodiments may therefore be used to generate a specific and stable temperature range along with the ability to accommodate varying levels of magnetic materials exemplary embodiments may also be used to control magnetic field penetration depths within multiple substrate configurations and temperatures in an exemplary embodiment a magnetic induction circuit board may be used to provide radio frequency rf energy so that the frequency of the rf energy emitted as the magnetic field into the substrate can be frequency modulated the magnetic field into the substrate may therefore be selected to correspond to specific requirements such as to correspond to the density and magnetic attraction of the specific substrate the magnetic field can therefore be focused to the particular substrate or operating parameter exemplary induction controls 110 are illustrated in fig2 control of the induction system consists largely of solid state components that may include switches digital.