Up Down Counter design based on Arduino MEGA compatible board is the topic of this article.it uses 2x16 LCD display to show the counter values and 4x3 keypad to input initial 3 digit number.The counter will count Up/Down according to ...

Interfacing LCD Display with serial Interface like I2C can save microcontroller I/O making it a practical alternative to a standard parallel 8 bit interface. We’ll use PCF8574 I2C port expander and PIC16F876A microcontroller to establish IIC communication by 2 lines, ...

This implementation of Arduino based PWM Fan Controller is simple circuit that allows controlling fan speed by varying the duty cycle of the output signal. For PIC16F684 version click here. I’ve tested with Deepcool 120mm fan and it works OK, ...

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 ...

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 ...

Arduino Ohm Meter is one of the simplest circuits that can be built with minimal number of required components. As can be seen from design schematic a standard 2x16 LCD display and 3 resistors are all you need to complete ...

A simple wave generator should be a part of every electronics enthusiast toolset. Basic Sine/Square output in reasonable frequency range will be sufficient for general use. Luckily such generators are available in form of a very popular AD9850 module.  Search ...

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 ...

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  ...

MAX7219 is a common cathode display driver with a simple serial interfaces that can be easily connected to a microcontroller. Among other useful features this IC has built in brightness control and scan control capability that allows to limit the ...