In the case of the light sensor (phototransistor) and temperature sensors (LM-335) it is not necessary to connect the power, because they are powered with low current measurement input via a resistor pull-up (for microprocessor-based controllers with the CPU power supply 5V).
Sa kaso ng liwanag sensor (phototransistor) at temperatura sensor (LM – 335) ay hindi kinakailangan upang ikonekta ang kapangyarihan, dahil sila ay pinapagana na may mababang kasalukuyang pagsukat ng input sa pamamagitan ng isang risistor hilahin – up (para sa microprocessor – batay sa controllers na may CPU 5V kapangyarihan supply ng) .