A Very Large VU Meter Indeed via hack a day

It used to be a must-have on any hi-fi, a pair of moving coil meters or LED bar graphs, the VU meter. Your 1980s boombox would have had them, for example. VU, for “Volume Units”, is a measure of audio level, and the fashion for its visual measure in consumer audio equipment seems now to have largely passed.

The LED bar graph VU meters were invariably driven by the LM3915, a chip that contains a resistor ladder and a stack of comparators which can drive LEDs directly. [Juvar] has taken an LM3915, and used it to drive a set of opto-isolated triacs which in turn drive a stack of appropriately coloured mains LED bulbs concealed within an Ikea Vidja lamp. The result is a huge and very bright VU meter that is as much a lighting effect as it is a measure of sound level.

Read A Very Large VU Meter Indeed via hack a day

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A Portable Meditation Aid • Hackaday.io via hackaday.io

Read A Portable Meditation Aid • Hackaday.io via hackaday.io

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BreatheDot: A Portable Meditation Aid via HackaDay

I’ve been doing more meditation lately and this little project would be a great way to explore the ATTiny while creating a productive tool. — Douglas

BreatheDot: A Portable Meditation Aid via HackaDay

This is a small battery-powered meditation aid that is powered off a CR2032 battery. It uses an ATTiny85 and a single blue LED. By matching your breathing with the LED, you should feel the effects after 3 to 5 minutes. 

The benefit of having a piece of hardware is that you can use it quickly and you don't have to strain your eyes looking at a screen. 

It uses the box-breathing method used in yoga and the Navy Seals. Hopefully this project can help in promoting better health and well being.

Read BreatheDot: A Portable Meditation Aid via HackaDay

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Rasperry Pi Gaming System Built Without Any Soldering (video) via Geeky Gadgets

A new Instructables project has been posted this month which allows you to create a Raspberry Pi gaming system using the awesome RetroPie emulation software without soldering any components at all. 

The breadboard RetroPie Raspberry Pi gaming system is powered by a Raspberry Pi Zero together with 4 x AA batteries. Watch the video below to learn more about this great project. 

Building a game machine is a very good project to initial child studying electronics. However, most RetroPie projects built by an adult, the main reason is building it require too many advanced skills at the same time, soldering, 3D printing, or Laser cutting, metal case patching… 

This project aims to make it simple, all things built on the breadboard, the first tools you should know while studying electronics. The most beautiful thing using breadboard is most things can be reused. When you want to build the next project you can unplug and reuse the components and also reuse the breadboard itself!

Read Rasperry Pi Gaming System Built Without Any Soldering (video) via Geeky Gadgets

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How to use a high current solenoid with Arduino via Adafruit Industries

How to use a high-current solenoid with Arduino So you have a solenoid that you want to use as an electric door lock, or some other kind of actuator with your Arduino. But, here's the problem: too high a current for the Arduino to source, and too high of a voltage to drive. Well fear not, using a simple transistor we can set up the solenoid to work hand in hard with your Arduino. 

Read How to use a high current solenoid with Arduino #Arduino via Adafruit Industries – Makers, hackers, artists, designers and engineers!

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Arduino Boards and Components via Amazon Arduino Boards and Components via eBay

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Making it Miniature: Integrating the ATtiny85 in your Arduino Project via Hackster’s Blog

I love the ATtiny85. I use it in practically every project of mine — components of CastMinder are powered by the ATtiny85, and HaptoTech is completely powered by the ATtiny85. The ATtiny is also the brains of my game console/business card with a screen.

Regular Arduino boards are awesome for prototyping and extended development, but sometimes it’s necessary to turn to something a little cheaper and smaller. The ATtiny85 satisfies both of these constraints quite handily — it costs only about a dollar, and the whole microcontroller is no bigger than the fingernail of your pinky.

Read Making it Miniature: Integrating the ATtiny85 in your Arduino Project via Hackster’s Blog - Medium

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Developing Maker Grit via Barb Makes Things [Video]

“Don’t do it for them!”

Oh, yes, have I been here over the years of raising my son. Like all parents, I have wanted to jump in and “save” him and his projects. I feel like I ground off several sets of teeth over the years keeping my mouth shut, but I think it has helped  him create his own level of “maker grit.” — Douglas

Developing Maker Grit via Barb Makes Things

Some tips for grown-ups working with kids. There are a lot of valid ways of making things, but they aren't all equally effective at developing grit. Tinkering FTW.

See also: How To Fail Like a Pro:

Subscribe to Barb Makes Things on YouTube

Bluetooth Controlled Motorized Camera Slide via Adafruit Industries

Build your own camera slider to get those great shots while also getting a bit geeky at the same time. — Douglas

Nothing better than a Ruiz Brothers’ project! From the Adafruit Learning System:

We really love photography and camera gear here at Adafruit, so we came together and upgrade our original 3D Printed DIY camera slider.

It’s now motorized using a single NEMA-17 stepper driven by the Adafruit Motor Shield ontop of an Ardunio Uno.

The Adafruit Bluefruit SPI Friend allows us to remotely control the movement of the camera slider using the Adafruit Bluefruit LE Connect app on a mobile gadget like an Android or iOS device!

Read Bluetooth Controlled Motorized Camera Slider 

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Son of Sonoff: $5 WiFi Wireless Smart Switch via hack a day

We’ve covered the Sonoff a few times–a very inexpensive box with an ESP8266, a power supply, and an AC relay along with a way to tap into a power cord. Very inexpensive means $5 or $6. The supplied software will work with several systems (including, recently, Alexa). But what self-respecting hacker wants to run the stock firmware on something with an ESP8266 inside?

[Tzapu] certainly didn’t. But he also knew he didn’t want to start from scratch every time he wanted to deploy a switch. So he built SonoffBoilerplate and put the code on GitHub. The code manages taking configuration (including network settings) using a web-portal, can update itself over the air, and integrates with Blynk and MQTT. If you don’t like that code base, there are other choices including one that has a failsafe reconfiguration mode.

Read Son of Sonoff via hack a day

ESP8266 and Sonoff products at Amazon

 

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Q&A: If I'm trying to subscribe to various, but specific blogs (RSS Feeds). Is FeedBurner the right place...

Read Douglas E. Welch's answer to If I'm trying to subscribe to various, but specific blogs (RSS Feeds). Is FeedBurner the right place, or is FB specifically for your personal blog analytics? on Quora

This Arduino zen garden lets you draw in the sand remotely via htxt.africa

I love projects that bridge the gap between the digital and the physical world. I remember seeing something similar to this year’s ago when I first visited Maker Faire Bay Area. I’ve linked a video of that project below, too. — Douglas

The Japanese rock garden, or simply zen garden, has become a popular desk toy, but the folks over at Makr Toolbox have taken it to the next level with an Arduino system that lets you draw in the sand at the press of a button.

The system works with a gantry that sits below the sandbox. Powered by a pair of motors, the gantry works much like those on a 3D printer, something the creator of this project has experiance with, but without the Z axis. In the middle of the gantry there is a magnet that moves a ball bearing across the sand.

Read This Arduino zen garden lets you draw in the sand remotely via htxt.africa

My video from Maker Faire Bay Area 2008 of a similar project

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Conductive Design: 10 Objects Transformed Into Touch Pads & Circuits via WebUrbanist

Imagine being able to draw out circuits, sew them into clothing, apply to the exterior of common items in your home. Very cool technology and both methods and applications are growing quickly. — Douglas

Conductive paint, ink and thread can be drawn, woven or even tattooed into objects like denim jackets, carpeting and leather iPad cases to make them into electrical circuits, adding a new layer of functionality as well as cool-looking graphic patterns. Draw circuits in any shape, create smart objects that interact with apps, and answer your phone while biking by swiping your finger across your sleeve. These 10 projects – some of which are available commercially – show how far conductive designs have come in less than four years.

Read Conductive Design: 10 Objects Transformed Into Touch Pads & Circuits via WebUrbanist

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How to Make Your Sensors Smarter via Hackster’s Blog

Quite an amazing idea. This article details using a series of common sensors, like microphones, accelerometers, light sensors and more, combine their data streams and sense a wide variety of home activities instead of building sensors into each, individual device. —Douglas

To fulfill the real promise of the Internet of Things there needs to be computing and sensing in each and every object in your home. In your office. In your neighborhood.

But not only would that be impractical, and expensive, it would be intrusive, and awkward. So what if, instead of deploying thousands of sensors in a room, you could deploy just a single sensor that could indirectly monitor the whole room?

Read How to Make Your Sensors Smarter via Hackster’s Blog - Medium

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E-Paper IoT Door Sign PCB via Tindie Blog

I have a number of paper projects floating around in my head, but they always seemed a bit too difficult to put together. This post and video help clarify the issues in a number of ways. — Douglas

E-Paper, E Ink, or one of the several other ways to compose/capitalize this class of device is likely best-known in Amazon’s Kindle and other eBook readers. And why not? This technology is easy on the eyes, and only uses power when it changes what is displayed. 

It’s such a neat concept that one would think it would be used in more projects. It does, however, have a few drawbacks like the fact that it generally doesn’t come in color, and doesn’t refresh fast enough for any sort of acceptable animation. The other important drawback from a DIY perspective is that they are relatively difficult to control. As seen in this Hackaday.io writeup, you can’t simply tell one pixel to be a certain shade of gray and expect it to work without some serious fiddling.

Read Tindie Blog | E-Paper IoT Door Sign PCB via Tindie Blog

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John Park’s Remote Effects Trigger Box via Adafruit on YouTube

A complicated, but extremely powerful, project that allows you to control almost anything, almost anywhere without using Bluetooth or Wifi. -- Douglas



Build this powerful RF Feather-based controller to wirelessly trigger props, lights, effects, and more! Using 900Mhz (or 425Mhz) RF for long-range,  encrypted communications between the transmitter and the receivers, this general purpose controller will make your wireless triggering wishes come true! Plus, you get to use a rotary encoder knob to scroll menu sets, and punch in your commands on the lighted 4x4 Trellis keypad.

Build your own from the Learning Guide tutorial here

Read John Park’s Remote Effects Trigger Box @adafruit @johnedgarpark #adafruit via YouTube

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Quick and dirty raspberry pi retro console from an old TV via Make

Great project of how to turn something old into something very, very, new — if a bit retro looking. — Douglas

Many people see the incredible game systems built by people like Ben Heck, with custom formed plastics and complex electrical setups, and feel like they cannot build anything as awesome as that. I hope this project shows you that you can put together something cool with minimal skills and effort.

Watch Quick and dirty raspberry pi retro console from an old tv

Siri Controls Your PC Through Python and Gmail via hack a day

Read Siri Controls Your PC Through Python and Gmail via hack a day

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It Can Do Anything - 3DSIMO Mini Review

An interesting handheld 3D Pen that also can function as a hot wire foam cutter and USB soldering iron. -- Douglas

David from 3DSimo reached out to me and I was immediately intrigued by the product he offered. This is the 3DSimo Mini! It looks like a 3D pen, but it does a lot more than just printing plastic!

 

In the package you will receive several adapters that's interchangeable. The including tools are foam cutting, soldering, burning and 3D printing. This is the best multi-tool I have ever used and performed really quite nice as well!

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ACLU says demanding US citizens unlock phones at the border is unconstitutional via The Verge

The American Civil Liberties Union has filed an administrative complaint with the federal government after a US citizen was detained at the border and forced to unlock his iPhone SE. Aaron Gach, an artist and activist who was holding an exhibition in Belgium, was subjected to interrogation by US Customs and Border Protection upon his reentry into the country at San Francisco International Airport in February. Gach was forced to unlock his phone, and in doing so the ACLU says CBP agents violated Gach’s constitutional rights, specifically his Fourth Amendment right protecting him from unlawful search and seizure.

Read ACLU says demanding US citizens unlock phones at the border is unconstitutional via The Verge

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Maker Update #32: Heat Shrink Tubing via Cool Tools

Heat shrink tubing is such a small thing, but it can make your projects more robust as well as better organized. Learn about all its uses in this video. — Douglas

Here’s this week’s Maker Update, featuring the best DIY projects of the week. (Show notes here.) As usual, I have a Cool Tool review included. This time, it’s heat shrink! Of all the things I have in my electronics toolbox, nothing gets my kid more excited than seeing me use heat shrink on a project. The stuff is like magic, plus there’s usually fire involved — so that’s a bonus for him.

Read Maker Update #32: Heat Shrink Tubing via Cool Tools

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Arduino Basics Intro to Stepper Motors #Arduino via Adafruit Industries

Another great tutorial on using Stepper motors in your Arduino projects. - Douglas

Read Arduino Basics Intro to Stepper Motors #Arduino via Adafruit Industries – Makers, hackers, artists, designers and engineers!

In this video we take a look at very low-priced, but still very popular stepper motor, the 28BYJ-48. This 5V stepper is very useful in low-torque and medium torque applications where precise positioning is required.

We are using the ULN2003 driver IC to control the board along with the “Cheap Stepper” library. You can download Cheap Stepper here:https://github.com/tyhenry/CheapStepper.

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Seeed EMG Detector via coolcomponents.co.uk

Interest in biohacking grows every day. What man/machine interface could you make with this component? Share your ideas! — Douglas

The EMG detector is a bridge between your muscles and microcontrollers, the sensor gathers small muscle signals and then amplify and filters them to produce an output signal that can be recognized. You can add this signal into your control system. Note: The sensor cannot be used for medical purposes.In standby mode, the output voltage is 1.5V. When detect muscle active, the output signal rise up, the maximum voltage is 3.3V. You can use this sensor in 3.3V or 5V system.

Read Seeed EMG Detector via coolcomponents.co.uk

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Arduino Trinket - Ocean-roaming data buoy | Hackaday via hackaday.com

An amazing free-roaming, ocean buy with tracking information. Is this something your STEAM group could put together — together? — Douglas

Put a message in a bottle and toss it in the ocean, and if you’re very lucky, years later you might get a response. Drop a floating Arduino-fied buoy into the ocean and if you’ve engineered it well, it may send data back to you for even longer.

At least that’s what [Wayne] has learned since his MDBuoyProject went live with the launching of a DIY drift buoy last year. The BOM for the buoy reads like a page from the Adafruit website: Arduino Trinket, an RTC, GPS module, Iridium satellite modem, sensors, and a solar panel. Everything lives in a clear plastic dry box along with a can of desiccant and a LiPo battery.

Read Arduino Trinket | Hackaday via hackaday.com

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Google opens up Classroom so anyone can now become a teacher via The Next Web

I often find myself assisting my college professor wife with her online classrooms using Blackboard, Moodle and others. This also has me often thinking about putting together my own online courses. Google has made this much easier by providing everyone access to their new Classroom service. 

Poking around in it the other day, it seems very similar to other online classroom products I have used and could provide you with an easy method of hosting your own educational projects -- Douglas

Google is opening up its Classroom educational service to allow anyone to create and teach a class on its platform. 

The web-based tool works across devices and Google says it can be used to help manage classes for adult education, hobbies, and after school programs. 

Classroom should come in handy for people who want to do more than just post tutorials on their blogs and YouTube channels; they can add resources, post tasks and assignments and interact with students as they progress through lessons. 

This is the second major update to Classroom in 2017: last month, Google expanded the service to allow anyone to join classes, without the need for a G Suite for Education account (which is usually made available by schools and universities to their students).

Read Google opens up Classroom so anyone can now become a teacher via The Next Web

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Live Out Your Astronaut Dreams With Lego's Meter-Tall NASA Apollo Saturn V Rocket via Gizmodo

Lego seems to be the “gateway drug” for so many makers and I couldn’t help highlighting this amazing kit. The sheer size and number of bricks included in this model are mind boggling. Even better, you can get your own version to build.

The Saturn V was the THE rocket of my child hood and I watched many of them launch on TV with all the Apollo missions. It brings back some amazing memories— Douglas

To this day, the Saturn V remains the largest and most powerful rocket NASA has ever blasted into space, which is perfectly reflected in Lego’s new Apollo Saturn V model. That model stands a full meter (over 39 inches) in height, with the Apollo lunar lander, lunar orbiter, and astronauts, hidden away inside.

The set started life as a Lego Ideas submission by builder saabfun, who quickly achieved the 10,000 votes from fans required for Lego to consider it for production. It was eventually approved, and while the final version of the Apollo Saturn V looks quite a bit different than saabfun’s submission (Lego modifies the winning models so they’re consumer-friendly) the results will still look amazing perched on your desk

Official Lego Kit Available June 1, 2017 for $120 USD direct from Lego - More Information

Read Live Out Your Astronaut Dreams With Lego's Meter-Tall NASA Apollo Saturn V Rocket via Gizmodo

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$14 LinkIt BTLE/WiFi IoT Board via CNXSoft

Another IoT (Internet of Things) board to check out. Lots of features.

What are your favorite IoT boards and projects? I'm looking to collect and share as much information as possible as I work on my own IoT projects. -- Douglas

Mediatek Labs has launched a new IoT development, which on the surface looks similar to LinkIt Smart 7688 board, but the internal design is quite different as the MIPS processor and Linux OS, have been replaced by Mediatek MT7697 ARM Cortex-M4 processor running FreeRTOS, and beside WiFi, also includes support for Bluetooth 4.2 LE.

Read $14 LinkIt 7697 Bluetooth 4.2 LE and WiFi IoT Board is Powered by Mediatek MT7697 ARM Cortex-M4 MCU via CNXSoft – Embedded Systems News

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Onion Pi makes your web traffic anonymous via Open Electronics

Hmmm, might be an easy (and relatively cheap) way to play around with Tor and learn a bit more about this anonymizing service. -- Douglas

Adafruit’s Onion Pi is a Tor proxy that makes your web traffic anonymous, allowing you to use the internet free of snoopers and any kind of surveillance. Follow Adafruit’s tutorial on setting up Onion Pi and you’re on your way to a peaceful anonymous browsing experience.

Tor is an onion routing service – every internet packet goes through 3 layers of relays before going to your destination. This makes it much harder for the server you are accessing (or anyone snooping on your Internet use) to figure out who you are and where you are coming from.

Read Onion Pi makes your web traffic anonymous via Open Electronics

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ARRL :: Technical :: More Arduino Projects for Ham Radio via ARRL

Interested in combining the power of Arduino with the long running technology of HAM Radio? This book is a great place to get started. — Douglas

Building on the success of Arduino for Ham Radio, this book — More Arduino Projects for Ham Radio — includes 15 completely new practical and functional Arduino projects for the ham shack. This time, we branch out to use some of the newer Arduino variants and devices. Each project is complete and functional as-is, but room has been left for you to add personal touches and enhancements. That’s part of the fun of the Arduino and Open Source communities — building on the work of others, and then sharing your designs and innovations for others to learn, modify, and improve.

More Arduino Projects for Ham Radio starts by building a solid foundation through descriptions of the many new Arduino boards and add-on components, followed by a collection of practical ham radio-related projects that showcase a wide variety of applications. There is something here for everyone.

Read ARRL :: Technical :: More Arduino Projects for Ham Radio via Home

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MintyPi 2.0 is one of the coolest 3D printed Pi mods via Open Electronics

I am amazed -- day after day — with the cool things being done with Raspberry Pi computers. This project uses an empty Altoid tin (favorite recycled item of the makerspace set), 3D Printed enclosures and a Raspberry Pi Zero to make and ersatz Gameboy (and more). A great build as well as and interesting toy to play with after you build it. — Douglas

3D printing enthusiast Sudomod has just validated the elaborate and undeniably stylish Altoids mint tin via one slick Raspberry Pi project: the mintyPi 2.0.With the help of some precisely modeled 3D printed parts, the maker has managed to turn an empty Altoids tin into a fully functioning Raspberry Pi game console.

The outcome is an absolutely cool and handsome mini game console.

Read MintyPi 2.0 is one of the coolest 3D printed Pi mods via Open Electronics

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The Old Computer Museum is a portal to the captivating past of vintage tech via The Next Web

It is amazing (and a bit concerning) how many of these old computer systems I remember — and actually used. I spent some time the other night browsing through this with my 19-year-old son just to show him what the “state of the art” was in computers and technology when I got started. — Douglas

Read The Old Computer Museum is a portal to the captivating past of vintage tech via The Next Web

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