Python Rpi

Raspberry Pi python programming tutorials.

DS18B20

Interfacing DS18B20 Temperature sensor with Raspberry Pi

DS18B20 is a commonly used temperature temperature sensor providing 9 bit to 12 bit digital Celsius temperature measurements. The sensor communicates over one wire bus. Each sensor has a 64 bit serial code enabling multiple sensors to be connected to the same one wire bus. The Raspberry Pi has drivers for one wired devices to be connected to GPIO pin-4 by default. 1-wire is a device communication data bus system developed by Dallas semiconductor providing low speed data, signalling and power...

March 9, 2015By Python Rpi, Raspberry Pi, Tutorials, , , , 13 CommentsRead more...
EM-18 RFID Reader Module

Interfacing EM-18 RFID reader with Raspberry Pi

RFID (Radio Frequency Identification) uses electromagnetic fields to read, monitor and transfer data from tags attached to different objects. It is not necessary that the cards are to be in visibility of the reader, it can be embedded in the tracked object. The tags can be actively powered from a power source or can be passively powered form the incoming electromagnetic fields. EM-18 RFID reader module is one of the commonly used reader and can read any 125KHz tags. It features...

February 20, 2015By Python Rpi, Raspberry Pi, Tutorials, , , , 33 CommentsRead more...
TTL to RS232 Converter

Using UART on Raspberry Pi – Python

UART stands for Universal Asynchronous Transmitter / Receiver, a popular serial communication interface which provides full duplex communication between two devices. The term universal means that transmission speed and data format are configurable. As it is asynchronous it doesn't need to send clock signal along with the data signals. UART uses two data lines for sending (Tx) and receiving (Rx) data. The ground of both devices should be made common. UART Communication

Freeing up UART pins on Raspberry Pi GPIO

By default...

February 20, 2015By Python Rpi, Raspberry Pi, Tutorials, , 11 CommentsRead more...
hc-sr501-pir-motion-sensor

Interfacing HC-SR501 PIR Motion Sensor with Raspberry Pi

All living beings radiate energy to the surroundings in the form of infrared radiations which are invisible to human eyes. A PIR (Passive infrared) sensor can be used to detect these passive radiations. When an object (human or animal) emitting infrared radiations passes through the field of view of the sensor, it detects the change in temperature and therefore can be used to detect motion. HC-SR501 uses differential detection with two pyroelectric infrared sensors. By taking difference of the values, the average...

February 4, 2015By Python Rpi, Raspberry Pi, Tutorials, , , 5 CommentsRead more...
HC-SR04 Ultrasonic Sensor

Interfacing HC-SR04 Ultrasonic Sensor with Raspberry Pi

HC-SR04 Ultrasonic Sensor Ultrasonic distance sensors are designed to measure distance between the source and target using ultrasonic waves. We use ultrasonic waves because they are relatively accurate across short distances and don't cause disturbances as they are inaudible to human ear. HC-SR04 is a commonly used module for non contact distance measurement for distances from 2cm to 400cm. It uses sonar (like bats and dolphins) to measure distance with high accuracy and stable readings. It consist of an ultrasonic transmitter,...

January 30, 2015By Python Rpi, Raspberry Pi, Tutorials, 35 CommentsRead more...
Push Button Switch

Using Switch with Raspberry Pi – Python

I hope that you already go through our tutorial, LED Blinking using Raspberry Pi. Detecting switch status is one of the basic step in learning Raspberry Pi GPIO operations. Here we using Python programming language. I hope that you already installed Python GPIO Library in your Raspberry Pi, if not please follow our first tutorial LED Blinking using Raspberry Pi.

Raspberry Pi GPIO Pin Out

Raspberry Pi GPIO layout

Pull Up...

January 26, 2015By Electronics, Python Rpi, Raspberry Pi, Tutorials, , 0 CommentsRead more...

Led Blinking using Raspberry Pi – Python

Led blinking is one of the beginner circuits which helps one to get acquainted with GPIO pins of Raspberry Pi. Here we use Python language to write the code for blinking Led at one second intervals.

Components required

One led 100 ohm resistor Jumper cables

Raspberry Pi GPIO Specifications

Output Voltage : 3.3V Maximum Output Current : 16mA per pin with total current from all pins not exceeding 50mA For controlling a Led using Raspberry Pi, both python and the GPIO library is needed.

Installing Python GPIO Library

Note: Python and...

September 25, 2014By Python Rpi, Raspberry Pi, Tutorials, , 4 CommentsRead more...
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