EG Projects

In this article, we will be making an IoT-based pre-paid electricity system and learn exactly how that works. We will create a meter which will monitor the electricity usage and report to a monitoring server (which we will also create) for bills. In an ordinary electricity system, bills come after the usage, and then we…

This tutorial is a part of series of tutorials on pwm(pulse width modulation) signal generation with stm32f103 microcontroller. Previously we looked upon how to generate pwm signal with stm32 microcontroller using keil uvision 5 ide and stm32cubemx code configurator. We moved forward on generating variable pwm signal using internal timers of stm32f103 microcontroller. We studied about generating pwm, now…

In this tutorial i am going to teach you how to interface relays with stm32f103 microcontrollers. Stm32 microcontrollers works on 3.3 volt TTL logic. Where as electrical relays minimum take +5 volts to make a regular connection. We must need an external circuit to drive relays with stm32 microcontrollers. This post is about teaching you…

Stepper motors as the name depicts moves in steps. They are popular in industry due to their ability to rotate their shaft at an accurate location and outputting high torque at low angel movements. One can also control the stepper motor step speed and angle accurately with out the need of feed back mechanism. Though they…

This tutorial is about interfacing 7 segment led display with stm32 microcontroller using keil arm mdk 5 with stm32 HAL libraries for code compilation. Stm32cubemx is used to initialize the stm32f103c8t6 microcontroller peripherals/variables pins, operating frequency, oscillator selection etc. Stm32cubemx initialized settings are then imported to keil mdk arm 5 project. Stm32cubemx automatically generates code for…

The post explains about how to use stm32 pins as input using keil and stmcubemx ide. A simple led on/off tutorial with push button as input is made to explain the coding and working. When a push button is pressed the led turns on and when push button is released the led turns off. The…

This tutorial is about generating pwm (pulse width modulation) signal with stm32f103 microcontroller using its internal hardware timers. Stm32f103 microcontroller components/peripherals initialization code is generated using stmcubemx ide and code is written and compiled in keil MDK-ARMv6 ide. A simple led is derived on a fixed pwm signal output. Led dims and blinks according to the duty cycle and frequency…

In this tutorial i am going to teach you how to control speed of dc motor using stm32 microcontroller and l293d half h bridge control ic. Dc motors are common motors you see in your houses(DC water pumps, DC fans), toys etc. DC motors rotate at a constant speed but their speed can be varied…

In this article, we will control our home geyser from anywhere in the world. Life is fast and busy, and we all want to leverage the benefits of technology in our day-to-day life by automating where and when we can. In this experiment, we will automate our geyser in integration with our alarm app so…

In this tutorial, we’ll learn how to build a device that works as a virtual doctor. The device inputs patient data, which can then be emailed remotely to a registered physician using the simple mail transfer protocol (SMTP) — the internet standard communication protocol for electronic transmissions. The purpose of this device is to support…

In this tutorial, we’ll learn how to use device-to-device (D2D) communication to make daily life a little simpler. For example, you’ll be able to control household appliances, such as the coffee machine, a light switch, or the AC — and do so from inside your vehicle. So, if you’re arriving home one evening, the presence…

This tutorial is about interfacing a servo motor with nodemcu esp8266 WiFi module. A web page is served by the nodemcu which enlists the servo motor controls. User can connect to nodemcu esp8266 and access the web page. To open the web page in browser user has to type the HTTP address of the server…

Voice-controlled assistants that respond to human speech and commands are no longer a novelty. It’s estimated that one in every four adults in America owns a smart speaker, such as Google Home or Amazon’s Echo. These devices offer a point of communication between you and your connected devices, providing convenience and support by automating certain…

Looking forward to a ready-made morning (or afternoon) cup of coffee? It’s possible to ensure the ideal cup at the ideal time is ready and waiting for you. This is thanks to an automated system that uses the Internet of things (IoT). In this tutorial, we’ll develop an IoT-based coffee machine that operates at a set…

This tutorial is about controlling stepper motor over WiFi through desktop or mobile web browser using nodemcu esp8266 WiFi module. Nodemcu will work as a server and it will serve a web page. Web page contains the stepper motor control buttons. Stepper motor takes steps to complete one full 360 degree rotation. Number of steps…

LM35 is a temperature sensor that outputs an analog signal which is proportional to the instantaneous temperature. The output voltage can easily be interpreted to obtain a temperature reading in Celsius. The advantage of lm35 over thermistor is it does not require any external calibration. The coating also protects it from self-heating. Low cost (approximately…

This tutorial is about making/building your own characters/special images and then displaying them on character 16×2 lcd. Generating custom characters or special character images and displaying on lcds of any sizes (16×1,16×2,8×1,8×2,20×1,20×2,40×1,40×2 etc) is not a very hard task. One must go through the internal structure of lcd control set in order to know how…

ADC0804 is an IC(integrated circuit) which converts the input analog voltage to its equivalent digital output. It is a stand alone analog to digital converter. Though now it is decades old and replaced by newer analog to digital converters which provide more flexibility, consumes less power, provides output in multiple formats and are smaller in…

8255 is general purpose programmable peripheral interface. It is used with many microprocessors and microcontrollers for various purposes. The device has three 8-bit ports port A, port B and port C. These ports can be used as input or output. These ports are further divided in to two groups A and B. Each group further…

Here is one of my semester project from my bachelors degree Tic Tac Toe game. It is made in c++ language using visual basic as tool to write and compile code. Game supports multiplayer as well as computer as a player. Its not an easy task to build this game especially when it includes computer as a player…