About: Ibrar Ayyub

This PIC16F877 microcontroller tutorial answers the question, ” How to implement a up down counter using PIC16F877 ? ”   Using PIC16 simulator (Proteus) you can verify this counter code and change it according to your needs. Using one push button (Labeled as Count, as shown in figure below) you can increment (When SW1 switch is towards […]

This PIC microcontroller tutorial provides a simple calculator implementation for PIC16F877 microcontroller. This is a simple one digit[1] calculator which implements only 4 functions addition(+), subtraction(-), multiplication(x) and division(/). The code for PIC16F877 is written in C language using MPLAB with HI-TECH C compiler. You can download this code from the ‘Downloads‘ section at the bottom of this […]

Several automated and semi-automated devices require a message to be displayed in order to indicate their working status. In continuation to LCD interfacing with PIC18F4550, this article explains how to display a message or string on a 16×2 character LCD. In the previous article, a single character was displayed on LCD by properly configuring its […]

PIC Microcontroller timer/counter by Dr. Tom Lombardo  

Lecture on “Intro to Microprocessors” using Wilmshurst’s “Designing Embedded Systems with PIC Microcontrollers” Chapter 1, sections 1-3 Topics: What is an Embedded system?, Embedded examples, CISC vs. RISC, Memory: Volitile vs. non-volitile, Memory Organization: Von Neumann vs. Harvard Chapter 1, sections 4-6 Topics: Microcontrollers vs. Microprocessors, Microcontroller families, Microchip Inc. History and background, Table of […]

Description This is an updated version of the UFO LED Chaser project, revised to use the PWM LED Chaser code version 3.0.0 with support for variable chase speed.   The basic LED chaser ‘engine’ firmware is the same as that used with the 481/483 LED chaser projects also on this site. The only difference is the […]

Description This page is has been written to support construction of the UFO LED Chaser Kit #432K. This neat little circuit provides 8 LEDs directly driven from the PIC along with a single mode control switch.  The firmware elsewhere on this page drives the LEDs with a 5 bit PWM signal providing each of the […]

Description This neat little circuit provides 8 LEDs directly driven from the PIC along with a single mode control switch.  The firmware elsewhere on this page drives the LEDs with a 5 bit PWM signal providing each of the 8 LED channels with four levels of intensity; off, dim, mid, bright.  A number of sequences […]

Description Update: Variable chase speed option kit now available (see here for details) This neat little circuit provides 8 LEDs directly driven from the PIC along with a single mode control switch.  The firmware elsewhere on this page drives the LEDs with a 5 bit PWM signal providing each of the 8 LED channels with […]

Description Update: Variable chase speed option kit now available (see here for details) This neat little circuit provides 8 LEDs directly driven from the PIC along with a single mode control switch.  The firmware elsewhere on this page drives the LEDs with a 5 bit PWM signal providing each of the 8 LED channels with […]