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João Alves

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1024 Samples FFT Spectrum Analyzer Using an Atmega1284

“This relatively easy tutorial (considering the complexity of this subject matter) will show you how you can make a very simple 1024 samples spectrum analyser using an Arduino type board (1284 Narrow) and the serial plotter. Any kind of Arduino …

2D Semiconductors Found to Be Close-To-Ideal Fractional Quantum Hall Platform

“Columbia researchers first to discover a quantum fluid—fractional quantum Hall states, one of the most delicate phases of matter—in a monolayer 2D semiconductor; finding could provide a unique test platform for future applications in quantum computing Columbia University …

3D Printed Belt Driven Robot Arm

“3D printed robot arm running on Arduino, contributed and supported by an active community. This 3D printed robot arm featured in 20sffactory is largely based on the popular design by Florin Tobler shared on Thingiverse. His open source design kicks …

8x24x8 RED GREEN BLUE LED CUBE

“I have previously done an 8x16x8 Led Cube Clock controlled by Arduino Mega 2560 and Real Time Clock Module DS3231 more than 2 years ago and until now it still works fine. I also conducted the tests using ESP-01 …

A Rubik’s microfluidic cube

“Scientists have recently engineered a modular system based on the Rubik’s cube to design and reconfigure microfluidic systems. Research teams had previously pursued the arrangement of microfluidic blocks in diverse conformations to suit varied experiments. In this work, Xiaochen …

Adding Voice to a CircuitPython Project Using Amazon Polly

“Display quotes and synthesize speech on an Adafruit PyPortal using CircuitPython and AWS Serverless. As a natural means of communication, voice is a powerful way to humanize an experience. What if you could make anything talk? This guide walks through …

Alphabet’s Loon balloons provide their first commercial internet service in Kenya

“A 35-balloon fleet will provide internet across 50,000 square kilometers Alphabet’s Loon division, which uses floating balloons to provide internet, has today launched its first commercial service in Kenya. In a blog post announcing the news, Loon’s …

Apple HomeKit WS2812B LED Controller

“There are a lot of projects based on WS2812B LED strips out there, but most of these are using homebridge or any other solution - mostly based on MQTT - to communicate with HomeKit. Some projects are using effects via Apple HomeKit …

Arduino Music Notes Detector

“Detecting music notes from the audio signal is difficult to do especially on Arduino due to limited memory and processing power. Especially when the note is not a pure sine wave, which is generally the case. If we take the …

AT90S1200 Binary Clock

“A binary clock that displays hours, minutes, seconds in groups on a square grid. I wanted to build a binary clock that didn’t display BCD time. So I used an obsolete even then AT90S1200 (which has to be programmed …