lx1971 mini control board 12/9/2003 microsemi rev 1.0a integrated products 11861 western avenue, garden grove ca. 92841 714-898-8121, fax: 714-893-2570 www. microsemi . com lx1971 light sensor integrated products schematic r3 vdd r1 r2 c2 4.7f vout gnd c1 0.1f lx1971idu vdd nc nc source sink nc nc vss 1 2 3 4 5 6 7 8 open the lx1971 mini light sensor board ha s been designed to easily interface and control virtually any lighting requirement. resistor values can be changed to adjust desired minimum brightness range and slope. see lx1971 datasheet and application note for additional information. out src dd out out v=ir2 r1 = open r2 = 60.4k ? r3 = 0 ? v=3.3v at total dark, v = 10mv at maximum lux, v = 2.5v photo package pin out 1 2 3 45 6 7 8 du p ackage (top view) functional pin description n ame d escription v dd input supply voltage (some boar ds wired with a red pigtail.) v ss ground reference for power and signal output (some boards wired with a black pigtail.) snk output current sink src output current source (some boar ds wired with a purple pigtail.) l l x x 1 1 9 9 7 7 1 1
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