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In this post I'll show a simple running LED circuit. Currently only 2 patterns are available but additional effects can be easily added by slightly modifying the code. This design uses only 16 LED's however PIC16F877 has 5 I/O ports ...

3 Digit Dot Matrix Display with SPI interface is an advanced version of recently published 7x5 Dot Matrix Character Generator project. This design is more complex as it contains 4 microcontrollers. Three PIC16F88 were used to control 7x5 Dot Matrix Displays, ...

Digital Alarm Clock design based on PIC16F876A will be demonstrated in this post. Various modules from earlier project were implemented in  current design hardware and source code. For example it uses the same 7-Segment Display and multiplexing routing as in ...

In this post I’m going to show you how to interface an I2C Real Time Clock – RTC with PIC microcontroller. Only a basic hardware configuration and a communication protocol are presented here. I’m planning to extend it to a ...

Vacuum fluorescent display can be a good alternative to a Liquid-crystal displays in some applications. They have a number of advantages over LCD like extended temperature range and excellent contrast in high brightness environment. The main disadvantage is higher power consumption ...

In this post I'll show you how two QDSP-L149 5x7 dot matrix  LED Displays can be used to create a  4 Digit display module. The trick is to change  the roles of rows and columns. So now each 5x7 Dot ...

3 Digit Up Down Counter shown here is based on PIC16F877A microcontroller. The count is shown on the 2x16 LCD display and the direction is controlled by a switch connected to bit 3 of PORTA. With minimal changes the attached ...

This post is about building a Simple IR Proximity Sensor based on PIC16F877a micro controller. Usually these simple circuits are built using discrete components and include an OP AMP for comparing the photo diode voltage to a preset value. Current ...

This post is about building a simple PIC16F88 based DC motor controller. Motor speed and direction can be controlled by two push buttons SW1, SW2. One for motor speed and the other for polarity. This post follows recently published projects like PWM ...

This post is about designing a simple PIC microcontroller based Solar Tracking system. It requires some basic electronics skills and good motor coordination. This design uses 2 unipolar stepper motors and 4 IR-850nm LEDs as sensors to follow the sun  ...