Bluetooth Based Programmable LED Message Board Circuit

john January 28, 2018 No Comments
Programmable LED Message Board Circuit In this article, the idea and implementation of remotely editing the text or message of the LED Matrix Display (Custom LED Signs) are presented. This article is the continuation to the article – LED Scrolling Display Board Circuit Using AVR Microcontroller which explains The Framing of Alpha-numeric characters and special characters. Showing a standstill message Scrolling the message Varying the speed of scrolling The message or text can be edited to bring custom LED signs by...
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LED Scrolling Display Board Circuit Using AVR Microcontroller

john January 28, 2018 64 Comments
LED Scrolling Display Board This article explains the steps involved in designing a scrolling message LED Display. The following features of the display are explained in the article. Framing Alpha-Numeric characters and special characters Multiplexing the matrices Serial mode of data distribution using shift registers Static text display Scrolling text display Mode selection between static and scrolling Increasing and decreasing the speed of scrolling in real-time This article focuses on displaying a static text on an LED board. The...
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DIY: Musical Keyboard Using ATMEGA8 with Tune Record, Save & Playback Options

john December 5, 2017 4 Comments
Musical Keyboard Using ATMEGA8    This article aims at developing a Monophonic (Single note) musical keyboard by generating the musical notes frequencies using a microcontroller (ATMEGA8). The project presented in this article is a 12 Key, Monophonic keyboard with the options To shift between the Higher and lower octaves Play the programmed tunes Record and save new tune in real-time     Frequencies of Musical Notes Taking the Piano as a view point, every key of a Piano has...
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GPS-GSM Based Vehicle Tracking System Using Microcontroller

john October 29, 2017 3 Comments
GPS Vehicle Tracking System This article mainly focuses on the idea and logic behind GPS Vehicle Tracking System with remote monitoring and security access using mobile phone. The GPS-GSM module is interfaced using a single microcontroller and the real-time GPS location of the system is inquired using SMS feature. The system is designed to operate only by the registered users. There is an option to add or remove the users in real-time. How does Car Tracking System Work? The...
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DIY – GSM Relay Control Using Smart Switch Board

john October 29, 2017 5 Comments
The main objective of this project is to control the ON/OFF status of electrical appliances at home or company remotely using a cell phone and relay switch. The appliances may include lights, fans, pump, and air conditioners and so on. Though all the household items can be automated to change their ON/OFF status, our prototype model GSM remote control circuit uses 8 electrical appliances. The project includes multiple users to control the appliances and uses unique SMS formats for...
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DIY Digital Clock with Temperature Display using PIC Controller

jojo December 31, 2014 13 Comments
One of the most enjoyable part of being an electronics person is creating your own gadgets and using them in daily life. In this article, we are building one of those with the help of SoloPCB design tools, a digital desk clock with temperature display feature.   The brain of the circuit is a Microchip PIC18F252 microcontroller. It acquires precise time information from DS1307 real time clock via I2C interface and displays it on four digit 38 mm seven-segment...
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Digital Voltmeter using Micro Controller PIC16F73A

mithun_das October 2, 2013 11 Comments
In this article, we have come up with a new PIC micro controller project. Our author Mithun has created a Digital Voltmeter Circuit using PIC16F73A and multiplexed 7 segment displays. The circuit is well explained with diagrams and the source code (written in Embedded C language) is available for download.  If you have any doubts while implementing this project, please feel free to ask in comments. Note:- You may also like to read our Digital Voltmeter using 8051 created...
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8051 Special Function Registers and Ports

jojo January 5, 2012 4 Comments
So you may have guessed something from the name itself – “Special Function Registers” known with an acronym SFR. Well, your guess is right 🙂 Okay! Lets come to the point. There are 21 Special function registers (SFR) in 8051 micro controller and this includes Register A, Register B, Processor Status Word (PSW), PCON etc etc.  There are 21 unique locations for these 21 special function registers and each of these register is of 1 byte size. Some of...
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8051 Addressing modes

jojo July 26, 2018 48 Comments
In this article, we teach you about 8051 addressing modes. If you’re familiar with 8051 already, you may know an addressing mode is a way to address an operand. If you are new, don’t worry – we’ve covered every aspect about 8051 addressing modes in detail. Let’s begin the journey. Lets begin this article with a simple question. “What is an addressing mode ?“. A simple question always has a simple answer too. Addressing mode is a way to...
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8051 Microcontroller

jojo November 7, 2018 49 Comments
A micro controller is an integrated circuit or a chip with a processor and other support devices like program memory, data memory, I/O ports, serial communication interface etc integrated together. Unlike a microprocessor (ex: Intel 8085), a microcontroller does not require any external interfacing of support devices. Intel 8051 is the most popular microcontroller ever produced in the world market. Now lets talk about 8051 microcontroller in detail. Before going further, it will be interesting for you to understand...
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