phototransistor, linear style sign for mobile concept and web

analog automation backdrop battery beam capacitor cell circuit circuitry components conveyor diode electrical electronic equipment galvanic inductance inductive inductor infrared lamp led light lightdependent lux microcontroller module output photodiode phototransistor proximity radio radionics receiver reflection resistance resistor robot schematic scheme seamless sensor sign signal switch symbol system transducer transistor transmitter triode vector