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To avoid the risk of contracting Covid-19, it is important not to touch surfaces including switches, doorknobs, and keys that have been frequently used by other people. This project is for a contactless switch that works with hand gestures. The...
A line follower is a simple robot that follows a thick line drawn on the floor using infrared (IR) or some other optical sensors. This line follower robot uses two motors with wheels on the rear and a castor...
I have an old window AC in my lab, which is at the terrace. The AC needs to be run intermittently, especially when I am out of station and the lab PC needs to be kept cool during noon...
This circuit presents a simple and low-cost DC-to-DC converter for phantom power supplies used in mixing consoles, microphone preamplifiers, telephone systems and similar equipment. There are many application circuits that require 24V and 48V phantom power supplies, but these...
This controller circuit based on an infrared (IR) object sensor (Sharp 2Y0A21) is used for saving power of the mirror light near a washbasin. The circuit contains manual on and off switches and an additional automatic switching system. Circuit and...
According to the World Health Organization (WHO) guidelines, people need to wash their hands with soap and water at least for 20 seconds to get rid of any virus. Although you have a stopwatch on phones, wristwatches, and other...
Corona Virus or COVID-19 has shaken the entire world. As per www.worldometers.info more than 121 countries have been affected by the virus. The death toll keeps on rising in many countries whereas in some they are going down gradually....
Board powered by Arm Cortex M7 that enables you to learn the Swift programming language and simultaneously develop innovative projects Swift has been a general-purpose programming language that uses a fast approach to ensure safety, performance and develop well-built...
This simple GSM security switch project is based on Arduino Nano microcontroller (MCU) and SIM800L GSM modem (Fig. 1). The cellular-based alert system is configured to send an SMS in response to a security switch action. When the security sensor...
This project presents a K-type thermocouple-based temperature measurement system using MSP430G2553 microcontroller (MCU). The MCU reads sensor data and updates it on a four-digit, seven-segment display, and also sends it to a smartphone through Bluetooth module. The author’s prototype...