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     SQL / PostgreSQL     How to Compare Arrays in PostgreSQL - PopSQL Basics:   Data types:                         - INT : whole number                         - VARCHAR(number_characters)                          - DATE : yyy-mm-dd                         - BLOB: binary large object to store large data                         - TIMESTAMP: yyyy-mm-dd hh:mm-ss Compare Arrays                1.  Equality operators (=, < >) do an exact element-by-element comparison                      ...

  Solar Tracking System Dual Axis Solar Tracking System, Servo Motor for rotate system follow sun, LDR sensors to get signal from sun Professor: Dr. Kwanghoon Kim, Kanha UON Email: flyworld@gmail.com,   uonkanha99@gmail.com Department of Telecommunication and Electronic  Engineering Royal University of Phnom Penh, Cambodia   Abstract – The purpose of this studying is to build an algorithm to get high energy of solar                                        follow sun. Using algorithm, we can determine the value of each LDR sensor to control servos motor for moving system.     Keywords: Arduino Uno, LDR sensors, Servo Motor, Solar Panel, CN3791 MPPT Solar Charger.           I. Introduction      This report specified on solar follow sun of system provided from LDR s...