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Hunting continues to make many animal species extinct, and the governments are unable to do much except introducing some laws and conducting regular surveys. But conducting a survey is not an easy task, especially without the help of technology. The...
Handheld devices play an essential role in the healthcare industry. With the sensors becoming smaller and compact, making a handheld device is also becoming easier and affordable. Heart rate measurement systems, or HR machines, are now available almost everywhere,...
Presented here is an LED-based 2D matrix display clock. There are a number of technologies used to create various displays in use today. The basic display systems we know are segment displays, 2D displays, 3D displays, and also mechanical...
This mono AF amplifier uses a single 5-pin LA4425A IC to deliver 5-watt output through a 4-ohm, 5-watt loudspeaker. The datasheet of LA4425A recommends a 13.2V power supply to get 5-watt output. A suitable heat-sink may be used for...
This project will enable remote control of two electrical appliances. It makes use of a TV or DVD remote that uses modulated infrared (IR) pulse train operating at 38kHz frequency. A good thing about this project is that it does...
A shortwave transmitter can be built with IC CD4049, which is used as an oscillator and a buffer amplifier. The transmitter can be crystal controlled to work at a frequency of 3MHz to 5MHz, which includes the ham radio...
Normally, we keep the photographs we take in a photo album to view or show to our friends or family later. This Arduino album can display those digital photographs one by one, sequentially, on TFT LCD colour display. The...
We have seen many smart glasses to detect the distance between objects or help visually challenged persons to recognise people’s faces. Here we extend it to the next level using optical character recognition (OCR). Expanding the DIY project to...
Here is a simple single-channel audio amplifier that can be made using IC LM380N. As per the datasheet, LM380N delivers an output of 2.5 watts with an 18V power supply and an 8-ohm speaker. This project was tested using...
Information about the total number of persons present inside a building such as a hospital, shopping mall, or factory helps provide crucial information to the security/safety personnel during emergency situations. This article presents the implementation of an Arduino-based wireless...