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With increased technological advancements, switches require updating with current times. To avoid the risk of contracting COVID-19, it has become important to not touch surfaces of buttons and keys that have been frequently used by other people. This calls...
In these times of COVID-19, it is essential to go through thermal screening for checking one’s body temperature before entering any premises. However, it is a tiring process as it involves measuring body temperature of all people, one at...
This project describes how to connect a web camera to the Raspberry Pi and make use of it. Raspberry Pi board has an onboard connector which can be used for connecting the camera directly. Connect the camera very carefully,...
Here we put all the theory to work and present a simple 1.5W power amplifier module that can be easily built with readily available components. The block diagram of the amplifier is shown in Fig. 1. It is typical...
Presented here is a simple humidity controller and indicator. In industries such as textile, the change in moisture content has a direct impact on the properties of fabric, such as tensile strength, elasticity, fibre diameter and friction. Therefore the...
Electromyography (EMG) is a technique of recording muscular activities by measuring the potential difference across a muscle of interest. EMG signal acquisition is the latest trend as it paves way for a new method of human-machine interface (HMI). Here,...
This circuit uses a NE555 timer IC, some LEDs, a couple of piezo buzzers and a few other components to produce audio-visual effects as per your requirement. The timer NE555 and its equivalents are widely used for all sorts...
A lot of accidents happen every day due to drunk driving. This is a very useful circuit for testing whether a driver is drunk or not. The circuit is easy to use, inexpensive and indicates various levels of alcohol...
Normally, ATMEL’s AVR microcontrollers are programmed using programmers. There are many ways to program the AVR microcontrollers, such as in-system programming, parallel programming and using bootloader. Advantage with the bootloader method is that you don’t need any external hardware...
Be it for weather prediction, detecting air flow movement through pipelines or obtaining altitude position with the help of a drone, pressure measurement plays an important role in a wide range of applications such as gas leakage, detection of...