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This device can provide real-time data of the movements of players during trainings and games, like acceleration, angle and directions, as well as their health status. It could be useful for both players and sports audience as it can...
Stroboscope is a device used to make a cyclically moving object appear slow-moving or stationary. This is realised by illuminating the object intermittently with short pulses of light. Stroboscope is used in the study of insect flight. It can...
Use of brushless DC motors (BLDCs) is on the rise. But their control usually requires rotor position information for selecting the appropriate commutation angle. Normally, a Hall Effect sensor is used to sense rotor position. But in cost sensitive...
Presented here is a IoT enabled air pollution meter to monitor air quality on your smartphone using Blynk application and Arduino board. Blynk is an Internet of Things (IoT) platform to control Arduino, Raspberry Pi and the like over...
Here is a simple, automatic water-level controller for overhead tanks that switches on/off the pump motor when water in the tank goes below/above the minimum/maximum level. The water level is sensed by two floats to operate the switches for...
Most battery chargers stop charging the battery when it attains its maximum charging voltage set by the circuit. This 12V battery charger circuit charges the battery at a particular voltage, that is, absorption voltage, and once the maximum charging...
Presented here is a simple pedometer (Distance Counter) circuit. It measures the distance covered by you while walking. It may not work very well for running! Circuit and working Fig. 1 shows a circuit diagram of the distance counter. The circuit...
We have so many login passwords to remember in order to access our laptops, emails or online banking. And forgetting password is something that we often face, and when we are in an urgent situation, it is quite annoying....
Pulse-width modulation (PWM) or duty-cycle variation methods are commonly used in speed control of DC motors. The duty cycle is defined as the percentage of digital ‘high’ to digital ‘low’ plus digital ‘high’ pulse-width during a PWM period. Fig....
We have heard of events/parties going out of control due to gate crashing by uninvited guests. Now, as a solution, imagine your door counting the number of invitees and raising an alarm when the number exceeds the guest list....