Sine wave oscillator using LM741

The oscillators are the devices that generate oscillatory (AC) output from given DC input. There are different kinds of oscillators based on the output waveform they generate. Like ·         Sinusoidal oscillators – they generate sinusoidal (sine) wave output ·         Square wave oscillators – they generate square (or rectangular) wave output ·         Triangular wave oscillators – they generate triangle o ...

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Analog Discovery USB isolation

Intro Back when I was deverloping the PSU burner, I wanted to have the Analog Discovery isolated from the common ground, to avoid noise and other issues. Since I did not have a way to do this, I ended up using a laptop on battery for measurements. But for long term, I needed to have this isolation. Unfortunately, things that can isolate USB at 480Mbps or faster are too expensive to justify. The solution The ...

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12$ 30MHz signal generator using Arduino

A signal generator is an electronic device that generates electronic signals and waveforms. These electronic signals are either repeating or non-repeating as per the requirements and field of applications. It is generally used in designing, testing, troubleshooting and repairing electronic devices. A signal generator can generate various kinds of waveforms. Most common are the sine wave, square wave, sawtoo ...

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Infinite Noise True Random Number Generator

Infinite Noise TRNG (True Random Number Generator) For instructions for compiling the and using Infinite Noise TRNG driver, go to the software sub-directory, and read the README file there. Both Linux and Windows are supported. The Infinite Noise TRNG is a USB key hardware true random number generator. It uses what I call a "Modular Entropy Multiplier" architecture (previously Infinite Noise Multiplier or F ...

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9V to 1kV DC/DC converter

Currently I'm working on a device to electrocute home insects like cockroaches, progress is small because they are smarter than I thought, but that's a different story. For that project I had to find a source of sufficient high voltage and output power. Presented in previous post 5V/400V converter had insufficient voltage and power, another option, flyback transformer was too dangerous to be used here. Fina ...

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Generating Tones by Tapping Fingers using Arduino

In this project we are going to build a piece of entertainment using Arduino. We all have that habit of tapping Table or Pen for creating any random music. Of course it might not be considered as a good mannerism, but we all enjoy doing it at least once. Hence I thought of taking it to the next level by using Arduino’s ability to play tones. Once you build this project you would be able to Generate tones by ...

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Easily measure diode capacitance and reverse recovery

The other day Linda from Purchasing came to me with a problem: Lou from Operations needed to source a replacement for a shorted diode on a switching power supply. The darned thing was marked with a strange part number that no amount of Googling could decipher. There was a recognizable logo marking, but that manufacturer could not provide a data sheet. The part number was from a previously acquired company a ...

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Hack-proof RFID chips claimed by MIT

MIT researchers have developed a new type of radio frequency identification (RFID) chip that is extremely difficult to hack. If such chips were widely adopted, it could mean that an identity thief couldn’t steal your credit card number or key card information by sitting next to you at a café, and high-tech burglars couldn’t swipe expensive goods from a warehouse and replace them with dummy tags. Texas Instr ...

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OscilloPhone: Use your Smartphone as an Oscilloscope / Signal Generator

Oscilloscopes and Signal Generators are two essential electronics devices to create and test electronic circuits. Unfortunately, these devices are very expensives for students starting electronics, or makers who want use electronic circuits in their creations just once... The idea of my project is to rethink your smartphone as a portable, powerful and secured platform, able to simulate an oscilloscope and a ...

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A Bladeless Wind-Powered Generator

You don’t need to travel far in the Dutch countryside before you come across a traditional windmill. Now a consortium of Rotterdam-based companies are planning to build a massive wind-powered generator structure in Rotterdam harbor that will generate energy without using rotating blades. The innovative ‘Windwheel’ will work on the EWICON (Electrostatic WInd energy CONverter) principle developed at TU Delft ...

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How To Make a Simple Variable Frequency Generator Using Arduino

A frequency generator is a very handy device in electronic design, development, testing and trouble shooting. It is such a kind of device which can generate the required frequencies which can be then applied directly to the target device for testing it. There are frequency generators which can generate the required waveform like sine wave, saw tooth wave etc. but for normal applications the square wave gene ...

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clocked 8-bit random pattern generator for CMOS synth

Motivation I was building some Lo-Fi CMOS synthies, just like the ones you see here: http://hackaday.com/2015/02/04/logic-noise-sweet-sweet-oscillator-sounds/ or here: http://www.nicolascollins.com/hackingtutorial11.htm   Soon after I played around with some simple sequencers and multiplexers to generate more complex sound patterns. I thought it would be cool to have a device to gate oscillators or swi ...

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