Electronics

Electronics, embedded, microcontroller, pic, projects, hobby circuits, circuit, blog, transistor, technology

How to solve MAX232 / MAX3232 Heating or Burning problem ?

Is your MAX232 or MAX3232 is getting heat or burned ? I have also faced similar issue and struggled a lot to find the problem when I was working in some projects involving RS232 communication. It is very easy to solve this problem, just follow the below guidelines. Follow Manufacturer Specific Datasheet As you know MAX232 / MAX3232 is manufactured by different companies. Each one is having it's own specifications and properties. So first you need to refer the manufacturer specific datasheet....

August 19, 2018By Ligo GeorgeElectronicsMAX232, MAX3232, RS2320 CommentsRead more...

I²C – Inter-Integrated Circuit

I²C or I2C is an abbreviation of Inter-Integrated Circuit, a serial communication protocol made by Philips Semiconductor (now it is NXP Semiconductor). It is created with an intention of communication between chips reside on the same Printed Circuit Board (PCB). It is commonly usually used to interface slow speed ICs to a microprocessor or a microcontroller. It is a master-slave protocol, usually a processor or microcontroller is the master and other chips like RTC, Temperature Sensor, EEPROM will be the...

March 23, 2018By Ligo GeorgeElectronicsBUS, I²C, Master, Serial Communication, Slave1 CommentRead more...

HC-05 Serial Bluetooth Module

Bluetooth is a technology for wireless communication. It is designed to replace cable connections.It uses serial communication to communicate with devices. It communicates with microcontroller using serial port (USART). Usually, it connects small devices like mobile phones, PDAs and TVs using a short-range wireless connection to exchange documents. It uses the 2.45GHz frequency band. The connection can be point-to-point or multi-point where the maximum range is 10 meters. The transfer rate of the data is 1Mbps. HC-05 Bluetooth module provides switching mode...

January 11, 2018By Basamma BElectronicsAT Commands, Bluetooth, HC-05, HC-06, Serial Communication, Tutorial0 CommentsRead more...

Wailing Siren using 555 Timer – Hobby Project

Today we shall talk about a really amazing circuit that produces a sound of a siren. There are different types of circuits that produce different kinds of sounds. Here is a simple circuit that produces wailing siren. The main principle of this circuit is to produce a wailing siren. The 555 timer IC is operated in astable mode. When the switch is pressed, speaker produces high pitch siren and when it is released, its pitch decreases and is switched off after...

December 21, 2017By Aman Deep555 Circuits, Electronics, Hobby Circuits, Projects555, 555 Timer, circuit, Siren, Wailing1 CommentRead more...

Mobile Phone Detector Circuit

This is a very interesting hobby project which can detect active mobile phone or GSM communication in its proximity. Active mobile phone means there is some live communication is going on like calls, sms sending or receiving etc. This circuit can be used to prevent unauthorized use of mobile phones in examination halls, conference rooms etc. As you already know, today's mobile phones (2G, 2.5G, 3G, 4G, LTE) are operating in electromagnetic signals ranges from 700MHz to 3500MHz. Each countries will...

July 16, 2017By Aman Deep555 Circuits, Electronics, Hobby Circuits, Projects555, mobile, Op-Amp, Sensor1 CommentRead more...

SPI – Serial Peripheral Interface

SPI (Serial Peripheral Interface) is a full duplex synchronous serial communication interface used for short distance communications. It is usually used for communication between different modules in a same device or PCB. SPI devices communicates each other using a master slave architecture with a single master. Multiple slaves are supported through individual slave select lines. SPI Interface SPI is called as a 4-wire bus as it requires four wires for its communication as shown below. In the case of single slave communications...

April 30, 2017By Ligo GeorgeElectronicsSerial Communication, SPI2 CommentsRead more...

What is a Microprocessor ?

What is a Microprocessor ? A microprocessor is an integrated circuit (IC) which incorporates core functions of a computer's central processing unit (CPU). It is a programmable multipurpose silicon chip, clock driven, register based, accepts binary data as input and provides output after processing it as per the instructions stored in the memory. Block Diagram of a Computer Block Diagram of a Computer Why we need a Microprocessor ? Thank you "B B DWIVEDI" for asking this question in the comment. So I thought of...

April 5, 2017By Ligo George8085, Electronics, TutorialsMicroprocessor, processor8 CommentsRead more...

Temperature Controlled Fan using Arduino

Here we are going to make a temperature controlled DC fan. DHT22 sensor is used to sense the room temperature and then we adjust speed of a DC fan/motor accordingly using PWM (Pulse Width Modulation). Arduino Uno is the heart of this project and a L293D driver IC is used to drive the DC fan/motor. Components Required Arduino Uno L293D Motor Driver IC DHT22 Sensor 16x2 LCD Display DC Fan/motor 9V Battery 10KΩ Potentiometer 220Ω Resistor Breadboard Circuit Diagram Temperature Controlled Fan using Arduino -...

March 27, 2017By Ali HamzaArduino, Electronics, Embedded, ProjectsArduino, Arduino Uno, DHT22, Fan14 CommentsRead more...