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Monday, May 16, 2022
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This unique but simple call bell can be used to call an office boy or a help at home from up to nine different places. Besides ringing, it shows the number of caller’s room or place from where the...
This project is a sequel of my earlier project ESP32 Cam project which was used to project a video from an ESP32 Cam to a network. By connecting a computer to that network and calling the IP address of...
Water meters installed in supply lines are common at residential, commercial, and industrial sites. These measure the volume of water flowing through the pipes generally in cubic metres. Presented here is a circuit that measures the amount of water...
Opting for an LED bike headlight is quite cost-efficient when it comes to improving your visibility on the road. It makes your presence known to the others and provides you with a clear visibility so that you can avoid...
This article describes how you can design a smart robot that can recognise your face and of other regular visitors. If the robot recognises correctly, it will greet and call out the name. The project can be used for security...
Low-current measurements are generally not reliable due to resolution of the measurement devices, which are mainly meant for measuring a current of a few hundreds of milliamps to a few amps. This circuit can measure currents of the order...
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...
 
 

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