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Electronics For You
May  2020   Issue Vol. 52  No. 5 

TECHNOLOGY FOCUS
Breaking Down The Buzz Around Quantum Computing
Quantum computing helps scientists and researchers in solving problems above a certain complexity. Quantum computers derive their power by utilising quantum mechanics and marvels such as superposition and entanglement, which allows them to perform a variety of computational tasks exponentially faster than classical computers

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Enjoy This Wireless 3D Mouse And Keyboard
We have seen different types of human interface devices (HID), such as mouse and keyboard. In older versions of the mouse, optical sensors were used to detect movement relative to a surface, thus they required a smooth surface to function properly. They could work in only two coordinates. With advancements in technology, we are now talking about 3D user interfaces (3D UI). So, let us make a 3D HID device which has the capability to work in all three coordinates
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This IR Remote Can Control Up To Eight Devices
This project based on an 8-bit ATmega328P microcontroller (MCU) can control up to eight devices connected to its electromagnetic relays. The article also describes how to program an MCU to accept infrared (IR) remote control signals for controlling the relays
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Making This Versatile Arduino-Based Frequency Generator Is Simple
This is a simple function generator that works in the audio frequency range. It can be useful for amplifier testing, experimentation in digital signal processing (DSP) and electronics labs
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Arduino Based Liquid Vending Machine
This is an automatic liquid vending machine based on radio-frequency identification (RFID) system. A fixed amount of liquid can be dispensed by swiping an RFID tag across the RFID reader. An alphanumeric LCD is used to display the operation and instructions for users to follow while dispensing the liquid. This machine could be implemented in organisations like hospitals and colleges (medical, engineering, etc) to provide 24-hour service to customers with no humans involved
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This Gauss Meter Is Simple To Make
Presented here is the design of a low-cost Gauss meter using a linear Hall effect sensor and a standard alkaline battery. A Gauss meter is used to measure the strength of a magnetic field. Here, in order to make sure that the meter readings are stable over the life of the battery, a low-drop fixed voltage regulator is used, which supplies a steady DC power source to the Hall effect sensor