Electronics Tutorials - Microcontrollers and Microprocessors

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

Generating PWM with PIC Microcontroller – MPLAB XC8

Pulse Width Modulation (PWM) is the one of the simple and most commonly used technique to produce analog voltages from digital signals. It has a wide variety of applications such as Digital to Analog Converter (DAC), DC Motor Speed Control, Sine Wave Inverters, Brightness control etc. PWM signals are ON - OFF signals (HIGH or LOW) (hence the name Pulse) whose HIGH or ON duration is changed (hence Width Modulation) in accordance with our requirements. The fraction of time period for...

May 21, 2015By Ligo GeorgeMPLAB XC8, PIC Microcontroller, Tutorials16F877A, CCP, Microcontroller, MPLAB, MPLAB IDE, MPLAB XC8, PIC, PWM, XC832 CommentsRead more...

Getting Started with DipTrace

DipTrace is a software that allows you to create simple and complex Printed Circuit Boards from schematic diagrams to layouts. It is a user friendly EDA software. We recommend this for electronics hobbyists, as it is a freeware allows us to design single layer and double layer PCBs upto 300 pins. You can purchase its paid version if you need more layers/pins. If you are a beginner to PCB designing, you should be familiar with following terms before going to pcb designing. ...

April 28, 2015By Febin MathewDipTrace, PCB Designing, TutorialsDipTrace, pcb, PCB Designing0 CommentsRead more...

Interfacing EM-18 RFID reader with Arduino Uno

Arduino Uno is an opensource physical computing platform based on ATmega328 microcontroller and provides a development environment for writing software for the board. It can be used for a variety of projects. EM-18 RFID reader is one of the commonly used RFID reader to read 125KHz tags. It features low cost, low power consumption, small form factor and easy to use. It provides both UART and Wiegand26 output formats. It can be directly interfaced with microcontrollers using UART and with PC using an...

March 17, 2015By Vivek KarthaArduino, TutorialsArduino, Arduino Uno, EM-18, RFID6 CommentsRead more...

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 Vivek KarthaPython Rpi, Raspberry Pi, TutorialsDS18B20, Linux, One Wire Bus, Python, Raspberry Pi13 CommentsRead more...

Access Raspberry Pi directly from Windows PC

Usually beginners require a display, keyboard and mouse for using Raspberry Pi. But being a linux based system, the Pi can be accessed through a variety of methods like SSH (check our Raspberry Pi SSH tutorial), VNC (check our Raspberry Pi VNC tutorial) etc.. But these methods require an already existing network consisting of a router or other network devices. It would be easier to directly connect the Pi to the computer and work with it without any additional hardwares like router. But...

March 1, 2015By Vivek KarthaRaspberry Pi, TutorialsDHCP, Ethernet, LAN, Raspberry Pi, SSH, VNC, Windows8 CommentsRead more...

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 Vivek KarthaPython Rpi, Raspberry Pi, TutorialsEM-18, Python, Raspberry Pi, reader, RFID33 CommentsRead more...

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 Raspberry...

February 20, 2015By Vivek KarthaPython Rpi, Raspberry Pi, TutorialsMinicom, Raspberry Pi, UART11 CommentsRead more...

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 holds 5x8 or 5x10 dot patterns of predefined characters in the...

February 10, 2015By Ligo GeorgeMPLAB XC8, PIC Microcontroller, Tutorials16F877A, 16x2, LCD, MPLAB, MPLAB X IDE, MPLAB XC8, PIC7 CommentsRead more...