Raspberry Pi action camera
Raspberry Pi

Raspberry Pi action camera

Action cameras are light and portable camcorders that are great for filming outdoor sports and activities. While there are varieties of commercial action cameras available in the market, makers and tinkerers prefer an alternative route of making their own version of any piece of...

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Making a Geiger counter with 555 timer IC
DIYSensor

Making a Geiger counter with 555 timer IC

Radioactive particles are found abundantly in nature. Whether they come from space or generated on Earth (radioactive waste, medical X-rays, etc), they are high-energy particles resulting from radioactive decays. The three major types of radioactive particles are named after the first...

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DIY portable spectrometer
ArduinoTechnology

DIY portable spectrometer

Spectral signature is a characteristic property of a material that represent how the matter interacts with an electromagnetic radiation at different wavelengths. By looking at the reflectance spectra of a material, scientists can not only retrieve vital information like the chemical...

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Traffic status on a wall clock
ArduinoIoT

Traffic status on a wall clock

Use of traffic navigation apps to minimize the wait time on road is very common for drivers these days. Google navigation gathers data from the drivers who are navigating via Google Maps and shows the traffic flow on smartphones in real time. While this is a great feature to have in...

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An open-source IoT power meter
IoTPower

An open-source IoT power meter

The first step toward finding ways to reduce home electricity usage begins with installing an energy monitoring system. These days you can find an electric meter in every residence, but it is likely that you would find it installed in a location that is more convenient to access for a...

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MyComm: A portable satellite messaging system
McuTechnology

MyComm: A portable satellite messaging system

Never before have we been so incredibly connected to one another than today; thanks to the prevalence of internet and mobile data networks. But the dimension of this connected world is finite and ends not far beyond the outermost cell phone tower. John Grant wanted to be connected to his...

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Measuring the speed of light with electronics
Basic ElectronicsLaser

Measuring the speed of light with electronics

The speed of light in vacuum is a well-known universal constant and is considered to be the nature's ultimate speed limit. No matter, energy, and information can travel faster than this speed. The speed of light has always been a topic of great interest and significance throughout...

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Arduino radar using sound waves
Arduino

Arduino radar using sound waves

A radar system uses high frequency radio waves for object detection. A high-power RF pulse is transmitted into space and its echo reflected off from an obstacle is recorded. By computing the time elapsed between the transmitted and reflected pulses, and knowing that the electromagnetic...

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