Tutorials

Electronics tutorials including microcontroller, microprocessor, programing and circuits. Intended for beginners, electronics hobbyists, college students, professionals and educational purposes.

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...
LCD Custom Characters

Custom Characters on LCD using PIC – MPLAB XC8

I hope that you already go through our tutorial, Interfacing LCD with PIC Microcontroller - MPLAB XC8. HD44780 compatible controllers used in these LCDs allows us to define 8 custom characters in addition to the standard pre-programmed characters. In this tutorial we will learn, how to create custom characters on LCD using PIC Microcontroller and MPLAB XC8 compiler.

DDRAM, CGROM and CGRAM

CGROM - Character Generator ROM

This is the memory which...

February 10, 2015By MPLAB XC8, PIC Microcontroller, Tutorials, , , , , , 7 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...
LCD Custom Characters

Custom Characters on LCD using PIC – MikroC

I hope that you already go through our tutorial, Interfacing Character LCD with PIC Microcontroller - MicroC Pro. These character based LCDs are commonly made using HD44780 compatible controllers. It allows us to define 8 custom characters in addition to the standard pre-programmed characters. In this tutorial we will learn to define our own custom characters using MikroC compiler.

DDRAM, CGROM and CGRAM

CGROM - Character Generator ROM

This is the memory which holds...

January 5, 2015By MikroC, PIC Microcontroller, Tutorials, , , , , , 6 CommentsRead more...
vnc

Using Raspberry Pi through VNC

Virtual Network Computing (VNC), is a graphical desktop sharing system used to remotely control a computer's desktop from another computer. It uses Remote Frame Buffer Protocol (RFB). It transmits keyboard strokes and mouse movement from the controller to the remote host and relays back the graphical screen updates from the host, over a network like Ethernet. Installing a VNC server like TightVNC on Raspberry Pi enables the user to remotely access the desktop of Pi and perform necessary operations. This is...

December 24, 2014By Raspberry Pi, Tutorials, 0 CommentsRead more...
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