#open-source hardware

[creativeera]

The Rise of Arduino Compatible Boards - An Exploration of the Expanding Ecosystem

The Genesis of an Open Source Movement When Arduino was launched in 2005, it helped spawn the age of accessible, affordable microcontroller boards and platforms. By providing a common hardware and software standard that was simple to use but still powerful, Arduino opened the door for non-engineers and electronic hobbyists to easily create interactive projects and prototypes. This drastically lowered the barrier to entry for physical computing and embedded systems. Within a few years, the Arduino platform had grown into a thriving global community with developers of all skill levels sharing code, tutorials, and ideas. The Growing Demand Inspires New Options As Arduino gained popularity and demand increased, companies recognized an opportunity to expand the ecosystem. Rather than competing directly with Arduino, many started releasing boards that were compatible with the Arduino software and libraries. These clones and derivatives allowed users to benefit from Arduino's openness while also having alternative hardware options at lower price points or with additional features. Some boards were nearly identical clones while others incorporated unique enhancements. Regardless, their compatibility with the Arduino IDE gave users the flexibility to choose a board that best fit their specific needs and budgets. A Proliferation of Board Types and Form Factors Today, the variety of Arduino Compatible boards available is staggering. In addition to the classic Uno and Nano form factors, there are boards shaped as mini PCs, single-board computers, wearables, educational kits, drones, robots, and more. Each brings something new while still maintaining the foundational principles that make Arduino great. For example, some focus on size and portability while others emphasize power, connectivity, or cost. Educational boards make learning to code more interactive and hands-on. Industrial boards enable Arduino to be used in professional contexts that require certifications or rigorous testing. A World of Enhancements Beyond the Original Spec Many Arduino compatible boards one-up the original Arduino specs by including features like WiFi, Bluetooth, GPS, high-speed microprocessors, more memory and flash storage, additional input/output pins, and specialized sensors. Some push processing power to the level of Raspberry Pi while shrinking the board size. Others add compatibility for new languages beyond just C/C++. Interfaces like Ethernet, USB, and add-on shields expand what these boards can interface with. Many also supply dev kits with components, sensors, motors and displays to simplify prototyping of specific project types. Get more insights on Arduino Compatible

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Vaagisha brings over three years of expertise as a content editor in the market research domain. Originally a creative writer, she discovered her passion for editing, combining her flair for writing with a meticulous eye for detail. Her ability to craft and refine compelling content makes her an invaluable asset in delivering polished and engaging write-ups.

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[glamourdj]

Arduino Uno: An Introduction to the World of Microcontrollers

What is Arduino Uno?

[taperwolf]

Visit Original Link

Here’s that clip of my Elektrosluch that I promised you.  You’ll hear first a wifi router, then a cable modem, then a PC keyboard, and finally different parts of an LCD monitor.  (Yes, it’s just stuff I had here at the computer desk.)  It’s not got the full stereo effect, because my sound input is just in mono at the moment, but it should give you an idea of the waves surrounding you at any given time.

[taperwolf]

I built a new noise box!

This is my version of the Elektrosluch, an open-source device for listening to and recording all the electromagnetic waves constantly whizzing about us. I came across the thing in MAKE Magazine Weekend Project they posted back in 2016, in which the design's creator walks you through building an older version of the device they presently sell for $100, though they do still have the full schematics on GitHub.

I first breadboarded the Weekend Projects version, and then built this permanent version as an adaptation of the Elektrosluch 3+ design, though more strictly it's a variant of the Elektrosluch Mini City version, which lacks the extra jack for an extended probe. I made some parts substitutions to suit what I had on hand; the case is repurposed from the container from a dollar store first aid kit.

(The bottom part of the circuit is pretty much a hack to let the opamp run nicely; see, these little chips want to amplify signals up to the limits of their power supply voltage, so they want a supply that goes as far below ground voltage as above it. So how do you do that on one 9v battery? Well, you just redefine where "ground" is. The resistors there form a voltage divider, which separates the 9v into 0v, 4.5v, and 9v lines — and then you tell everything in the circuit that the 4.5v line is really ground, which makes the 9v line 4.5 volts above that, and the 0v line 4.5v below that. So you make a ±4.5v split supply. The power LED is set to use the whole 9v, so it goes from the top to the bottom. I accidentally left out the power switch from the drawing — pretend it's there between the top of the battery and the top capacitor.)

The base circuit itself is pretty simple; it's two copies of the top schematic, with an inductor (which is just a neatly packaged coil of wire) feeding into an operational amplifier, which the resistors set to boost the signal by about 1470 times. The last capacitor strips any DC signal off what comes out of the amp, and then passes the AC signal to the jack; the left coil feeds the left channel, and the right coil feeds the right channel in a stereo jack. You can plug in headphones and listen directly, or feed it into some other audio input, like a guitar amp or a computer sound card. The design calls for both coils to be rated at 10mH, which in our case we have not got, so in mine the right coil is 10mH and the left is 30mH; I think this gives a bit of stereo texture to the experience.

It's quite a bit of fun going around the house and seeing what devices make what noises; fans and motors create neat drones; digital radio transmitters, like in your cellphone or wifi router, make semi-rhythmic pinging noises; the string of addressable LEDs I have acting like Christmas lights makes little trilling sounds in each tiny microprocessor as each light turns on or changes color. You can hear refrigerator magnets as you wave them over the coils. Certain spots are electromagnetically quiet enough that local radio stations fade in, so you hear ghostly, almost recognizable music in bits and chunks, sometimes coming in clearly until you inadvertently move from the spot that worked.

I'll try to make some recordings to show this off. I'm quite tickled with how well it works.