Electronic Projects

A flex sensor is a variable resistor, which measures the amount of deflection or bending it undergoes. The bending or molding of the sensor is what affects its resistance and this is what differentiates it from a standard, variable resistor. A flex sensor’s resistance is directly proportional to the amount of bend that occurs. Its…

A peephole, spyhole, or peekhole is a small opening through the door that allows viewing from inside to outside. Such door holes allow seeing outside the door without opening it. Usually, these door holes have a fisheye lens to have a wider look of the outside. In this project, we have developed a digital version…

An oximeter is a device that measures the amount of oxygen carried by a person’s red blood cells. Oxygen provides energy for our bodies, supports the immune system, helps replace cells that degrade, and more. Low blood oxygen levels can indicate certain health issues. These levels can also decrease as we age, so it can…

Have you ever struggled to fix nails on a wall perfectly parallel to the floor or ceiling? In this project, we have modeled an electronic-level device useful in placing anything perfectly parallel. This device is prototyped on the popular microcontroller board – the Arduino. It uses very few components to build, only an accelerometer sensor…

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 the previous tutorial, a Bass Boost Power Amplifier was designed. Now it’s time to start designing power amplifiers suitable for specific applications. In this tutorial, a car audio amplifier will be designed. The cars have been coming with inbuilt audio systems from years. An audio system of a car is one of the important features that shines as unique selling point (USP) for any car in the market. The audio systems have become a vital accessory for any car. Even many times consumers replace the default audio systems came in their car with new one for better driving experience.  

Continuing with the designing of application specific power amplifiers, in this tutorial a low power amplifier will be designed for regular mobile headphones. In the previous tutorial, a car audio amplifier using TDA2003 IC was designed. The mobile headphones are a type of miniature speakers designed especially for use with smart phones. These headphones do not have louder sound output. However, their sound quality can be improved by using an amplifier circuit with them.  For headphones, a low power amplifier need to be designed.   

In the previous tutorials, the amplifier circuits to boost audio from a single channel were designed. Over the last decade, there is growth in the audiophile. This has brought a revolution in the music industry. Now, people like to hear the high resolution surround music just like a 3D video. A surround sound system is designed to create a sound field like the sound is coming from back, front, left and right sides. It can also create the sound above the listener. The surround sound system is used in cinemas and drama theaters to give a realistic feeling to the audience.

In all the previous tutorials, power amplifiers were designed. On the basis of application, there are two types of audio amplifiers – 1) Pre-Amplifier2) Power Amplifier The pre-amplifiers are used to level up the audio signals from a microphone or audio source to standard voltage levels while the power amplifiers are generally used at the output stage of the audio systems to boost audio signals before they are reproduced by the speakers. As the name suggests, a Pre- amplifier prepares the signal which is coming from the microphone or line input for further processing and transmission of the signal. A preamp is the hidden part of any device. It is integrated in the USB microphones, sound cards and mixers.  

In all the previous tutorial, a pre amplifier using MAX4468 was designed. On the basis of application, there are two types of audio amplifiers – 1) Pre-Amplifier2) Power Amplifier The pre-amplifiers are used to level up the audio signals from a microphone or audio source to standard voltage levels while the power amplifiers are generally used at the output stage of the audio systems to boost audio signals before they are reproduced by the speakers. As the name suggests, a Pre- amplifier prepares the signal which is coming from the microphone or line input for further processing and transmission of the signal. A preamp is the hidden part of any device. It is integrated in the USB microphones, sound cards and mixers. 

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…

This Project aims in the building of one application of robots in the automation of Collecting environmental aspects. The robot supports remote performance monitoring and maintenance of various factors of the environment in any given area. The details of the design, setup and the use of the robot in Data Acquisition (DAQ) system are given here. The sensors provide accurate and reliable real time data needed for autonomous monitoring and control of any type of area or industry. Data Acquired by the proposed system can be remotely accessed, plotted and analyzed. This provides a fully automated solution for the monitoring and control of remote locations.

Sometimes Electronics hobbyist gets ideas to build robots from animals in nature. There are robot dogs, robot snakes, robot birds, and even robotic insects! In this project, you will build a robot of your own which will automatically drive chases a light source, mimicking a behavior called photo-taxis, seen in some insects and flowers. This is a robot that chases light, for this to work, the robot needs at least two lights detecting sensors, out in front and spaced apart from each other. 

This article is to make a gesture controlled robot or car. It will help you in building an gesture based android controlled robot without any experience in android app development by providing you the free android app. This app consists of touch and voice controlling interface of your robot. It is simple to start with downloading the app to your phone/tablet and start building your robot by following steps.

This Project is to design and implement an Ultrasonic Vehicular Parking Aid Display, which notifies the driver about obstacles coming in the way of parking. In light of the emerging traffic situation where parking space is at a premium such a device can be very useful and also facilitate parallel parking easily. The implementation of the idea with the ultrasonic sensor interfaced with Arduino and the technical details of this project follows later.

This project helps in understanding the insights of CAN protocol interfacing two different Microcontroller for example, PIC and Arduino. Controller Area Network or CAN protocol is a methodology of communication between various electronic devices like engine management systems, gear control, active suspension, ABS, lighting control, air conditioning, airbags, central locking etc. embedded in an automobile. For further learnings refer this article.