Patent ID: 6762842
Filing Date: 2004-07-13
Classification: G01N

Abstract:
A light analysis system, comprising:a) at least one receptacle; b) for each said receptacle, a light source which emits light; c) for each said receptacle, a light detector which detects said light emitted by said tight source; d) a microcontroller which controls said light source and said light detector; and e) a power supply circuit which supplies a constant voltage to said microcontroller, said power supply circuit including i) a bridge rectifier which receives an AC or DC power input and provides a rectified output therefrom, ii) a switching regulator coupled to said bridge rectifier which receives said rectified output and generates a substantially constant DC voltage therefrom, iii) a voltage regulator coupled to said switching regulator which receives said substantially constant DC voltage and generates a transistor logic voltage therefrom, and iv) a power switch coupled between said switching regulator and said voltage regulator.