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Fiber Optic Transmitter and Receiver ambient light sensor, i2c interface, 6-pin chipled package, http://optoelectronics.liteon.com/upload/download/DS86-2013-0004/LTR-303ALS-01_DS_V1.pdf Optoisolator with LED backlight TFT graphical display 480x272 16-bit colour with LED backlight 240x128 LCD display 320x340 RS-232 I2C or SPI LCD 4x10 character 3.3V VDD I2C or SPI 3 Line 12 character wide alpha numeric LCD LCD-graphical display with a hair of margin // margins from edges h_margin = hole_dist_side + thickness; v_margin = hole_dist_top*2; output_column = width_mm - h_margin; input_column = h_margin; col_right = width_mm - 9.5/2 - right_rib_thickness - tolerance; // left_panel_width = 40; // [1:1:84] /* [Holes] */ v_margin = hole_dist_top*2 + thickness; output_column = width_mm - hole_dist_side - thickness; // draw panel, subtract holes union() { z_position = height - v_margin; working_increment = working_height / (8+tolerance/5); // generally-useful spacing amount for vertical columns of stuff col_left = h_margin; working_height = height / 2 + hole_diameter + hole_margin*2.

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