Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 47 - Ai Robogenius
P. 47

    BUILD A PIR SENSOR CIRCUIT

                     A PIR (Passive Infrared) sensor detects motion by measuring infrared
                     radiation  from objects,  like  humans  or animals.  The sensor's  output
                     changes  when it  detects  a  moving  object,  triggering  an action.  This
                     project will connect a PIR sensor to a simple circuit to control an LED,
                     lighting it up when motion is detected. The circuit is powered by 3 AA

                     1.5V batteries.
                                                                                                  Signal   Power    Ground
                     To build the Motion Sensor Circuit, follow the given steps:

                       STEP - 1    Open a new circuit window in Tinkercad and rename your project (Motion Sensor

                                  Circuit).

                      STEP - 2    Connect the Power pin of the PIR sensor to the positive terminal of the 3x AA 1.5V
                                  battery pack.

                      STEP - 3     Connect the Ground pin of the PIR sensor to the negative terminal of the 3x AA 1.5V
                                  battery pack.

                      STEP - 4    Place a 220-ohm resistor and connect one end of the resistor to the Signal pin of the
                                  PIR sensor.

                      STEP - 5    Connect the other end of the resistor to the anode (positive side) of the LED.

                      STEP - 6    Connect the cathode (negative side) of the LED directly to the negative terminal of
                                  the 3x AA 1.5V battery pack.

                       STEP - 7    Click on the Start Simulation button to test the circuit.

                                                                             Introduction to Sensors in Tinkercad
                                                                                                                        45

| 42 43 44 45 46 47 48 49 50 51 52 |