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During the testing of audio systems and telephone-like systems, it is useful to have a sinusoidal signal generator that produces forward and inverted signals in the range of around 15Hz to 15kHz. Here is one possible way of making...
Recently, Google Glass was launched. It looks similar to ordinary glasses, but it consists of special transparent glass. This special transparent glass gives you the UI and works like a smartphone that displays news, time, books, and much more...
There are many types of home and industrial automation systems available in the market. These include IR remote controller, Bluetooth home automation, DTMF home automation, Wi-Fi home automation, RF home automation, and voice controlled home automation. The one presented...
We all have seen a physical doorbell outside the buildings. It is very useful; but in current scenarios where dangerous diseases like corona spreading exponentially in the entire world, the physical doorbell is not the right option. Continuously touching the...
Carrying a machine everywhere, which is capable of doing ethical hacking without getting noticed, is important in some hacking related tasks for which you may not like to carry a big laptop. For this we need a smart device...
Tracking and detecting suspicious activities is one of the most demanding tasks for security personnel and systems. If a security system fails in a place like airport or bank, criminals can rob at gunpoint. Out of fear, the victims...
Smartphone batteries don't last for long, and charging cables, which can break after a few months of use, can be annoying. Wireless Chargers can be a convenient alternative - you simply set it and forget it. But how does it...
The most commonly used multimeters and oscilloscopes are sold with simple non-symmetrical (single-ended) probes. But often we need differential probes to measure and observe signals between non-grounded test points. There are different types of differential probes available, but most of...
This digital photo frame is designed using Arduino Uno. Smartphones with high-resolution cameras and enhanced features have motivated people to click photos of almost everything that they come across. It is not possible to frame all photos on a...
Presented here is a robust, compact and hand-held mini rechargeable power supply that delivers 9.2V and 5V up to 1A (approx.) and 3.3V up to 500mA. It also includes a female A-type USB connector so you can power and...
 
 

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