Introduction: Python Greeting System

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This tutorial will teach people how to create a home system that will greet people when they come near the sensor. This will happens by having a distance sensor detect when a person comes approximately 30 cm near the sensor. Once this happens the LCD will display hello to the visitor and a green light will turn on.

Step 1: What You'll Need

3 x 330 ohms resistor

2 x 100 ohms resistor

1 x 550 ohms resistor

1 x RGB LED

1 x Ultra Sonic Distance Sensor

1 x LCD Display

Step 2: Connect the Distance Sensor

1. Connect VCC to 5v power

2.Connect the GND to ground

3.Connect the TRIG to GPIO 21

4.Connect the ECHO to a 330 ohms resistor which is connected to a 500 ohms resistor that is connected to ground. The 500 ohms resistor should also be connected to GPIO 20

Step 3: Connect RGB LED

1. Connect the first leg to 100 ohms resistor which is connected to GPIO 26

2. Connect the second leg to a 100 ohms resistor which is connected to GPIO 19

3.Connect the longest leg to 5 V power

4.Connect the last leg to a 330 ohms resistor which is connected to GPIO 13

Step 4: Connect LCD

1. Connect the VCC to 5 V power

2. Connect the GND to ground

3. Connect the SND to the SND pin on the Pi

4. Connect the SCL to the SCL pin on the Pi