{HEAD ~ A circuit} for heating {TAIL ~ a heating element} to a desired temperature and generating an output from a power source, said power source having a periodic varying voltage, said circuit comprising: 
for heating
{ HEAD ~ A circuit } for heating { TAIL ~ a heating element } to a desired temperature and generating an output from a power source , said power source having a periodic varying voltage , said circuit comprising :
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH