Interfacing LCD with CloudX Board

To have a good relationship between human world and machine world, display units plays a vital part. Displays allows us to know what’s happening in a device like the voltage, temperature, present status of the device and even device fault detection etc. LCD's have a very wide application in embedded systems and it is more preferred than seven segment displays. Alphanumeric LCDs are most commonly used in embedded projects since it is commonly available and easy to use. 16x2 LCD...

CloudX – Writing to PORTs

In the previous tutorial we saw how to blink an LED using CloudX board, but in some projects we might need to write to a PORT or a group of pins at the same time. For eg., for designing an 8 LED chaser, writing to pins one after the other makes your code look so bulky but writing to a PORT at once for this kind of projects will make your code look neat and more efficient. A PORT is...

Automatic School / College Bell using PIC Microcontroller

Here we are sharing a fully automatic and configurable bell which can be used in schools and colleges. It is made using commonly available microcontroller and other components. Components Required PIC 18F4550 16x2 LCD Display DS1307 or DS3232 32.768 kHz Crystal 16 MHz Crystal 4.7K Resistor - 7 10K Resistor 10K Preset 22pF Capacitor - 2 100nF Capacitor 4x4 Keypad 680R Resistor LED - 1 3V CMOS Battery BC548 1N4148 Relay (5V/12V) Circuit Diagram Automatic College Bell using Microcontroller - Circuit Diagram How...

Home Automation using Bluetooth and Mobile App

Technology is a never ending process. To be able to design a product using the current technology that will be beneficial to the lives of others is a huge contribution to the community. Generally in today’s modern world human beings are addicted to using modern equipment. So here we can perform home automation by using an Android App and Bluetooth as a wireless communication medium. Home automation not only refers to reduce human efforts but also energy efficiency and time...

SPI Communication with PIC Microcontroller – MPLAB XC8

SPI (Serial Peripheral Interface) is a full duplex synchronous serial communication interface used for short distance communications. It is usually used for communication between different modules in a same device or PCB. SPI devices communicates each other using a master slave architecture with a single master. SPI Communication SPI is called as a 4-wire bus as it requires four wires for its communication as shown above. In the case of single slave communications we need only 3 wires, as slave select (SS)...

I²C Communication with PIC Microcontroller – MPLAB XC8

I2C or IIC or I2C stands for Inter-Integrated Circuit. It is a very popular multi-master, multi-slave serial communication interface developed by Philips. I2C uses two bidirectional open drain data lines, Serial Data (SDA) and Serial Clock (SCL) with pull up resistors as shown below. Unlike UART, you can connect and communicate to multiple devices using the same I2C bus. I2C Communication I2C is a master slave protocol. It means that devices connected to I2C bus will be either master or slave. The master is...

Using ADC of PIC Microcontroller – MPLAB XC8

In this tutorial we will learn, how to use the ADC module of a PIC Microcontroller using MPLAB XC8 compiler. For demonstration we will use the commonly available PIC 16F877A microcontroller. Every physical quantity found in nature like temperature, humidity, pressure, force is analog. We need to convert these analog quantities to digital to process it using a digital computer or a microcontroller. This is done by using Analog to Digital Converters. An Analog to Digital Converter or ADC is a...

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...