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This project is used to detect colours and display the colour names on an LCD using the TCS3200 colour sensor module and Arduino board. The sensor outputs red, green, and blue colours’ reflected light values using colour tinted photodiodes....
Small drones are being used to deliver parcels, for videography of events such as marriages, and surveillance of enemy territory. You can make a drone at home without spending a fortune. Presented here is a low-cost quadcopter drone using...
This project can be used to control multiple electrical appliances on any floor from any floor of a multistory building that has up to six floors. It uses a controller area network (CAN) bus and Arduino Uno to control...
  Making public announcements in a quick, time-bound manner while covering large areas sometimes becomes costly. Due to the limitations related to travelling, it is hard to reach all the places within less time. To address this issue, I have...
Here is a simple stereo audio amplifier that can be made using a TDA1517 IC. A 14.4V regulated voltage is used as power supply for this amplifier. TDA1517 is a 9-pin (single-in-line package) audio amplifier IC, which is inexpensive...
This circuit uses power bank and DC-DC booster module not only for charging mobile devices but also to provide 1.2V to 37V DC power supply. The compact circuit can even be used during AC mains power failure. Circuit and working While...
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...
Motion sensor alarms are readily available in the market, but these are expensive. Here is a simple and inexpensive Arduino based motion sensor alarm with voice alert. It can be used for security purposes. Typically, for outdoor monitoring, motion sensor...
This circuit produces a rotating-wheel like LED lights pattern, which can be used to decorate public halls during parties, festivals, and marriage functions. The concept is based on the persistence of vision. Circuit and working The author’s prototype is shown in...