Photoresistor Light Sensor Arduino
A simple light sensor can be built using a photoresistor and Arduino UNO board. Similar design is available here. This design requires only a few additional components like 10k resistor and a 10k potentiometer to adjust the light intensity level ...
Arduino 4 Digit LED 7-Segment Countdown Timer
Arduino 4 Digit LED 7-Segment Countdown Timer based on Arduino MEGA will be shown in this post. For LCD version of this design follow this link. Similar project that uses PIC16F876 MCU can be found at this link. Raspberry Pi ...
PCF8574 I2C 8-bit I/O expander
In this post we’ll review a simple interface for PCF8574 I2C 8-bit IO expander IC and PIC microcontroller. For similar Arduino based implementation click this link. The format of present post is similar to 2 recently published tutorials about I2C ...
Binary to Hex 7-Segment Arduino
In this post I’ll show you how to build a simple Binary to Hexadecimal converter using common cathode 7-Segment display and Arduino Mega compatible Iduino Mega R3 board. Similar devices should also work ,however I did not test it. The ...
PCF8573P I2C Real Time Clock
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 ...
Arduino Ultrasonic Sensor HC-SR04
This post is about building a distance meter using HC-SR04 Ultrasonic Sensor and Arduino MEGA board. For PIC16F877 version click here. Raspberry Pi variant is also available at this link. HC-SR04 module can measure distances ranging from 2cm – 400 ...
Arduino with DS3231 Real Time Clock
In this post I’ll show you how to interface a RTC module DS3231 Real Time Clock with Arduino. This particular module uses I2C protocol to transfer current time to a micro controller. DS3231 library and header files should be installed ...
RGB LED Bar Graph
Current LED Bar Graph design for Arduino UNO platform uses 16 independently controlled RGB LED’s with integrated WS2812 chip. Similar project is available at this link. In general the voltage is divided into equal intervals equal to the number of ...
Digital Power Supply 0-14 Volt
Digitally Controlled Power Supply from 0-14 Volt based on PIC16F876A will be demonstrated in this post. This is a modification of Digital Power Supply 2.5-12V article and has similar characteristics. The most noticeable difference is the use of PCF8591P I2C Digital to ...
Stepper Motor Interface PIC16F
This article shows a basic interface between PIC16F microcontroller and a unipolar stepping motor using an assembly code. For programming the MCU you'll need PICKIT2 or PICKIT3 device. Similar design for Arduino platform can be found at this link. Instead ...
