My goal in this tutorial is to give you a broad understanding of how sensors work. Also, we will not go into the deep details of the physics of electronic components or equivalent models. But we will go into the functionality of the sensors enough to understand how the sensors can be used. In this video, I have reviewed the 10 most common passive sensors and introduced various circuits.I have done a detailed tutorial on these components on my YouTube channel and you can refer to the videos for each one.... in this VIDEO : What are passive sensors & how to use them? What is the difference between NTC and PTC? Applications of NTC thermistor Applications of PTC thermistor What is a NTC thermistor? What is a PTC thermistor? How The NTC Circuit Works How The PTC Circuit Works Light dependent resistors ( LDR) How The LDR Circuit Works Dark Detector LED Circuit LED light detector circuit Sensitive Moisture Sensor Magnetic Dependent Resistor (MDR) MDR Detector Circuitreed switch sensor reed switch Circuit IR Detector Circuit Infrared sensor Sound active switch sensor Sound active switch Circuit Ultrasonic sensor Ultrasonic Detector Circuit Gas sensor Gas Detector Circuit the preparation and editing of this tutorial took at least one working week so that you, dear colleague, can learn it in a short period of time. All my experience lies in this video.Please make me happy by commenting and liking the videos. Thanks -------------------------------------------------- metall detector pcb amplifire circuits micro robotic kits guncoil risistors capistors transistors ic layout electronics electric motors dc ac