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This simple circuit can be used as an LED emergency light, a power bank for charging mobile phones, and as on-the-go (OTG) USB DC fan driver. The power bank with 12Ah can deliver 2A current for charging a mobile phone....
A branded automatic water dispenser is usually expensive. So, a relatively low-cost do-it-yourself solution is presented here. It is a portable general-purpose automatic water dispenser perfectly suitable for homes to wash hands or feed water to pets. The presented...
Smart home solutions include IOT powered devices such as lights, fans, water pumping motor, kitchen accessories etc. Smart assistants are voice command based systems which are used to switch on or off the IOT devices. Android app is built...
Here is an Arduino based social distancing alarm cap meant for Covid-19 pandemic or similar disease outbreak. Maintaining the right gap for social or physical distancing is not always feasible. When we are outside, we forget to maintain the...
In this project, temperature data is logged in real time in MATLAB workspace by building a model using Arduino IO Library in Simulink. Process parameter measurement carried out for experimental research and analytical testing generally needs to be saved...
Due to the outbreak of Covid-19 pandemic, it has become important to check the body temperature of people without any contact with them to prevent spreading of the disease. There are many contactless thermometers available in the market, but...
The smart 230V AC bulb holder introduced here is an ultra-simple device with an automatic electric bulb controller switch and a standard electric bulb holder realised with the help of a few inexpensive and easily available components. The electric bulb...
Presented here is a simple timer kit built around an Arduino Uno board. It can be used to measure the time delay duration of devices like timer relays, circuit breakers, and other sequential logic circuits. This timer will be...
This project is based on an infrared (IR) sensor, which detects the presence of hands and consequently activates the motor pump to dispense alcohol-based sanitiser. The circuit is economical, reliable, and can be easily constructed, as explained below. Circuit and...
Most microphones’ output signals are weak and cannot be directly connected to some other circuits. Also, some microphones require DC power supply or high impedance inputs. Here is a dual (stereo) preamplifier for microphones that can be used with...