DIY

If you often forget to carry the key of your Garage, and feels irritated when you are in hurry, then you must try this DIY Fingerprint Scanning Garage Door Opener. Of course you can buy any Finger Print Door opener from the market, but this DIY Garage Door Opener is much cheaper and very easy build.  

This Garage Door Opener mainly uses Finger…

Almost every electronic hobbyist must have faced a scenario where he or she must measure the frequency of a signal generated by a clock or a counter, or a timer.  We can use an oscilloscope to do the job, but not all of us can afford an oscilloscope. We can buy equipment for measuring the frequency, but all these devices are costly and are not for everyone. With that in…

Arduino is an open-source development platform for engineers and hobbyists to develop electronics projects in an easy way. It consists of both a physical programmable development board (based on AVR series of microcontrollers) and a piece of software or IDE which runs on your computer and used to write and upload the code to the…

Raspberry Pi is an ARM architecture processor-based board designed for electronic engineers and hobbyists. The PI is one of the most trusted project development platforms available today. With a higher processor speed and 1 GB of RAM, the PI can be used for many high-profile projects, such as image processing and the Internet of Things.

To do…

Here's something interesting for the inner romantics and DIY circuit board assemblers among us. Yes, I'm talking to you, my friend; soldering iron in one hand, PCB board in the other, pining to tell your cherished special person how you feel about them, but clueless about how to express yourself. Sure, you could just tell them "I love you" — but words are nearly as…

ADC is the Analog to Digital converter, which converts analog data into digital format; usually, it is used to convert analog voltage into digital format. Analog signal has an infinite no of values, like a sine wave or our speech, ADC converts them into particular levels or states, which can be measured in numbers as a physical quantity. Instead of continuous conversion, ADC…

Generating low-voltage DC from the 220V or 110V AC mains is very useful and necessary in the field of electronics. Low voltage DC, like 5v, 6v, 9v, 12v, is used in electronics circuits, LED bulbs, toys and many household electronics items. Generally, batteries are used to power them, but they need to be replaced from time to time, which is not cost-effective and also takes…

Piano is developed by connecting a 555 timer ASTABLE multivibrator with variable frequency to a speaker. Piano is a wonderful musical instrument and one can make a cheap one using 555 timer IC chip. This concept of piano is achieved by making the timer generate 5-15 different kind of sounds. The different sounds are generated through timer by allowing it to run as free…

A stepper motor is a brushless DC motor, which can be rotated in small angles; these angles are called steps. Generally, a stepper motor interfacing with 8051 uses 200 steps to complete a 360-degree rotation, which means it rotates 1.8 degrees per step. Stepper motor control using 8051 microcontroller is used in many devices which need precise rotational movement, like…

Keypad interfacing with 8051 microcontroller represents one of the fundamental skills for embedded systems developers. Matrix keypads are an input device found in calculators, security systems, ATMs, and various industrial control panels. Keypads are widely used input devices in various electronics and embedded projects. They are used to take inputs in the form of …

Ultrasonic sensors are great tools to measure distance and detect objects without any actual contact with the physical world. It is used in several applications, like measuring liquid level, checking proximity and even more popularly in automobiles to assist in self-parking or anti-collision systems. Previously, we have also built many Ultrasonic Sensor…

The interfacing of a 16x2 LCD display with 8051 microcontroller is very popular and one of the most important in embedded systems programming. This tutorial will explain the complete LCD interfacing of 8051 C program, circuit connections, and coding strategies in a program with the use of the AT89S52 microcontroller.

The display units are the most important output devices in embedded…