Patent ID: 6396289
Filing Date: 2002-05-28
Classification: G01R,H05B,Y02B

Abstract:
Apparatus for setting the operating voltage applied to an incandescent lamp comprising:means for setting an output of a power supply to an initial lamp voltage; a test circuit comprising a resistor in series with said lamp and said power supply; means for measuring a first voltage said test circuit and a first current therein; means for presenting said first voltage and said first current as digital data; an operational circuit comprising said lamp and said power supply without said resistor; means for measuring a second voltage across said operational circuit and a second current therein; means for presenting said second voltage and said second current as digital data; means for determining a first operational circuit resistance and a second operational circuit resistance, wherein said second operational circuit resistance is derived from said first operational circuit resistance; means for determining a voltage setting from said second operational circuit resistance; means for storing said voltage setting in a memory; and means for setting said output of said power supply to said voltage setting.