RDA5981 is a $1 Fully Integrated WiFi Chip with an ARM Core

RDA’s RDA5981 is a fully integrated low-power WiFi chip from RDA Microelectronics. RDA5981 is a fully built WiFi chip highly intended for applications in the areas of a smart home, audio applications and IoT applications. The RDA5981 is being used in devices running Baidu DuerOS, the Chinese alternative to Amazon Alexa or Google Assistant. During the annual event of China’s semiconductor industry IC China 2 ...

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Open-V, The Open Source RISC-V 32bit Microcontroller

Open source has finally arrived to microcontrollers. Based on RISC-V instruction set, a group of doctoral students at the Universidad Industrial de Santander in Colombia have been working on an open source 32-bit chip called “Open-V“. Onchip, the startup of the research team, is focusing on integrated systems and is aiming to build the first system-on-chip designed in Colombia. The team aims to contribute t ...

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Plug And Debug With ScanaQuad SQ200 Logic Analyzer and Signal Generator

The ScanaQuad 200 by Ikalogic is a high-performance 4-channel logic analyzer and digital pattern generator. It is designed to be the best companion of a hobbyist when working on serial protocols like UART, SPI, I2C, 1-Wire, USB, I2S, CAN, LIN, RS232, RS485, and more. With the ScanaQuad 200 Logic Analyzer, you can capture signals, you can play them back, and you can even program genuine test signals using Sc ...

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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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