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Sometimes, we need frequent sensor data transmission from one end of the world to the other for which we use online servers and services like ThingSpeak, an IoT analytics platform service that allows you to aggregate, visualise, and analyse...
There is huge chemical waste being generated by billions of batteries used in remote controllers for electronic devices like TV sets, set-top boxes, air-conditioners, and even some ceiling fans now-a-days. The waste produced by their spent batteries keeps increasing...
During the testing of audio systems and telephone-like systems, it is useful to have a sinusoidal signal generator that produces forward and inverted signals in the range of around 15Hz to 15kHz. Here is one possible way of making...
Touching of a doorbell switch by different people can spread coronavirus and many other communicable diseases from one person to the others. So, protection from such diseases at the entrance doorbell switch is as much necessary as the use...
This project aims to display the information entered in a mobile phone on an LED dot-matrix type scrolling display. It is done by interfacing a Bluetooth HC-05 module to an LED dot-matrix display using an STM32 board. The STM32 board,...
A first-of-its-kind robot that can recognise a human face and see dreams—like a human—can now be yours! Interested? We humans can speak, recognise feelings and emotions, and even see dreams, which makes us different from machines. But does it make...
Radio detection and ranging (radar) systems detect the presence and distance of objects using radio frequencies. The distance of an obstacle is calculated from the time taken for the radio waves to travel to the object and, after reflection...
The most essential tool for engineers is a logic analyzer, which they operate using a laptop or PC to show the results. As stand-alone logic analyzer with a display can cost you around 10 thousand rupees or more. So,...
This is a simple “Weather Station using STM32 with ThingSpeak IoT” powered by STM32 ARM Cortex (Blue Pill), this system detects environmental parameters such as temperature, humidity, and Soil Moisture. DHT11 is a Temperature and humidity sensor that as...
This is a variable power supply with digital volt-amp panel meter. Its advantage is that you do not need a separate voltmeter, ammeter, or multimeter while using this variable power supply as the digital panel meter shows the voltage...
 
 

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