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A simple explanation for the working of an ideal diode circuit based on P-channel MOSFET and PNP transistor is presented here. The typical voltage required to turn on a diode is forward voltage. An ideal diode should have zero...
Presented here is an Arduino-based dish antenna controller to align the position of a satellite dish antenna by setting azimuth and elevation angles. The dish antenna should always point to a specific satellite in space to receive maximum signal....
Wheelchairs are useful for people for whom walking is difficult or impossible due to some illness, injury or disability. There are different types of wheelchairs. Manual wheelchairs are pushed using their handles. Motorised wheelchairs, are driven by joystick. Voice-controlled wheelchairs...
This article describes how to decode a remote controller and use it for home automation, along with Arduino. An infrared (IR) remote controller used in TVs, music players and the like uses IR rays for sending information or data...
Presented here is the circuit that drives twenty LEDs in a random manner. LED flashers and sequencers are used in decorative lights to give pretty colour combinations by glowing LEDs in random or sequential manner. This flasher has a...
Introduction This project describes how to make the alarm clock radio in Arduino. The main feature of this project is that it will display date, time, will Alarm on the desired time and it has a function of radio too....
This low-cost portable spectrum analyser can be used to analyse the frequency content of input signals up to 5kHz. Frequency spectrum of an input signal possesses vital information, and the same has been employed for various applications ranging from...
Described here is an Arduino-based fastest finger first system. In quiz shows, the buzzer or fastest finger first round is frequently used to determine which candidate (or group) achieves the highest priority in attempting the question. The fastest finger...
This project describes an Arduino-based wireless frequency meter designed to measure frequency of sinusoidal AC signals in the range of 50Hz to 3kHz. The authors’ prototypes of the transmitter and receiver sides are shown in Figs 1 and 2,...
This is a simple portable rain and steam detector in one circuit. It is compact in size, runs on 9V battery and is easy to assemble. Circuit and working The circuit diagram of the portable rain and steam detector is shown...