How to interface sensors with Arduino

Interfacing Sensors With Arduino Using MEP_ROBO UNO Board

Learning basics of adruino interfacing with sensors……..

Here let’s use the basic sensors like LM35 temperature sensor, PIR sensor, LDR, TSOP and Ultrasonic sensors.

                                                                                          Figure 1: Interfacing of Sensors.

• Interfacing of  LM35 with Arduino

In LM35 interfacing with Arduino, temperature information will be send to the PC using the code/circuit.

Generally, LM35 is a three pin temperature sensor which is used to measure temperature variations as an analog output. The operating range of the sensor is about -55 to 150?C. Connect the output pin of the sensor, to the analog pin (A1) of the MEP_ROBO development board..

                                                                                                             Figure 2: LM35

Step1: Procure Materials Required

• LM35
• MEP_ROBO Board with ATMEGA 328 IC.
• USB Cable.
• Computer with Arduino software.
• Connecting wires(3)

                                                                                Figure 3: Components Diagram

Step2: Write the program in Arduino UNO IDE.

Step3: Connecting LM35 with the Board

                                                                                                      Figure 4: Connection Diagram

• Place the temperature sensor to any of the analog pins A0, A1, A2, and A3.
• Here we are using A0.
• Connect Vcc of the LM35 with the Vcc of the board.
• Connect GND of the sensor with the GND of the board.
• Connect output of sensor with A0 of the board.

Step4: Connect USB cable to the board.

Step5: Download program to the board.

Step6: Output

The output is seen through the serial monitor. In Arduino IDE, take Tools----Serial Monitor. Set the baud rate to 9600.

                                                                               Figure5: Output