Automated Bubble Gun Just Because

After a recent trip to Disney Land, [Thomas] came home with an electric bubble gun. [Thomas] is a full-grown man. But since when did that stop us having fun blowing bubbles?? Obviously, a project was to be had using this fun little toy. So he decided to automate it.

So after taking some measurements with his trusty calipers, [Thomas] got on the computer and started designing an enclosure for the bubble gun using SolidWorks. It’s pretty simple. He designed it to hold the bubble gun in place, and allow him to attach a small RC servo motor in order to trigger the switch. Hooking that up to an Arduino Micro and he was now able to trigger it remotely.

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Why You Should Build A Clock For Social Good This Week

We’ve seen a wide range of emotional responses regarding [Ahmed Mohamed]’s arrest this week for bringing a clock he built to school. No matter where you fall on the political scale, we can all agree that mistaking a hobby engineering project for a bomb is a problem for education. People just don’t understand that mere mortals can, and do, build electronics. We can change that, but we need your help.

Our friends at NYC Resistor came up with a great idea. Why don’t we all build a clock? I want you to take it one step further: find a non-hacker to partner with on the project. Grab a friend, relative, or acquaintance and ask them to join you in building a clock from stuff you have on hand in order to promote STEM education.

Clocks have long been one of my favorite projects, and like the one shown above, most of my builds didn’t look anything like traditional clocks. Once you start getting into how clocks are built, you’ll be amazed at how accurate dirt-cheap clocks are and how difficult it can be to replicate that accuracy. Pass this knowledge on to your teammates. Teach them how to solder, or how to draw a schematic, or just how to open the case on some electronics without fear.

Post your project on hackaday.io and we’ll add it to the Clocks for Social Good list (message me with the link). If you decide to document it elsewhere just leave a link in the comments below. We’ll post a roundup of all these builds next week. I plan to repurpose the soldering workshop board I populated last week as the display for my clock. I’ll be helping a friend of mine learn to solder as part of the build!

Happy hacking, and thanks for helping to dispel fear and teach others about awesome engineering.

Need some inspiration to get going? You can always chat with others about it in the Hacker Channel. If you have an Arduino and some LED strips you can do something like this. Here’s a binary clock built with just a few LEDs. Or if you have a laser cutter at your disposal you can make a unique display with just a pair of motors.

Learn And Build A High Side Switch

As electronics engineer I have a mental collection of circuits that I’ve gathered over the years, much like a mechanic collects specialized tools as they work. All engineers do this and the tools in their tool boxes usually represent their project history and breadth.

A useful circuit to have in designer’s toolbox is the “high side switch”. Like it sounds, this is a circuit that switches the “high side” or positive voltage to a load.

We usually tend to switch things to ground as seen by outputs such as an Open Collector output, the reason being that ground usually is a known entity and is usually low impedance and is at a known voltage. But there are advantages to using a high-side switch in your circuits.

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Hack Your Rib Cage With Titanium 3D Printing

A Spanish hospital recently replaced a significant amount of a man’s rib cage and sternum with a titanium replacement. Putting titanium inside people’s chests is nothing new, but what made this different was the implant was 3D printed to match his existing bone structure.

An Australian company, Anatomics, created the 3D print from high-resolution CT scans of the patient. They used a printer provided by an Australian Government corporate entity, CSIRO, that helps bring technology to Australian companies.

Biomedical printing has been in the news quite a bit lately and we’ve covered CT scan to 3D model conversions more than once. Is this the dawn of the age of the cyborg? Maybe it’s really mid morning. Many people walk around with pacemakers, Vagus nerve stimulators, and plenty of more conventional titanium hardware in them now.

While the ethics of replacing a cancer patient’s rib cage is pretty clear, the real issue will be when people want enhancements just for the sake of it (think of the controversy surrounding runners with prosthetic legs, for example). It might seem far-fetched, but as replacements become better than originals, some people will want to opt for replacements for perfectly good body parts.

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Don’t Understand The Periodic Table? It’s Just A Quantum Truth Table

In the wee hours of the late 17th century, Isaac Newton could be found locked up in his laboratory prodding the secrets of nature. Giant plumes of green smoke poured from cauldrons of all shapes and sizes, while others hissed  and spat new and mysterious chemical concoctions, like miniature volcanoes erupting with knowledge from the unknown. Under the eerie glow of twinkling candle light, Newton would go on to write over a million words on the subject of alchemy. He had to do so in secret because the practice was frowned upon at that time.  In fact, it is now known that alchemy was the ‘science’ in which he was chiefly interested in. His fascination with turning lead into gold via the elusive philosopher’s stone is now evident. He had even turned down a professorship at Cambridge and instead opted for England’s Director of Mint, where he oversaw his nation’s gold repository.

Not much was known about the fundamental structure of matter in Newton’s time. The first version of the periodic table would not come along for more than a hundred and forty years after his death. With the modern atomic structure not surfacing for another 30 years after that. Today, we know that we can’t turn lead into gold without setting the world on fire. Alchemy is recognized as a pseudoscience, and we opt for modern chemistry to describe the interactions between the elements. Everyone walking out of high school knows what atoms and the periodic table are. They know what the sub-atomic particles and their associated electric charges are. In this article, we’re going to push beyond the basics. We’re going to look at atomic structure from a quantum mechanical view, which will give you a new understanding of why the periodic table looks the way it does. In fact, you can construct the entire periodic table using nothing but the quantum numbers.

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A DIY Mobile Soldering Iron

Cordless soldering irons are, as a rule, terrible. A few months ago, you could pick up a cordless soldering iron from Radio Shack that was powered by AAA batteries. You can guess how well those worked. There are butane-fueled soldering irons out there that will heat up, but then you’re left without the requisite degree of temperature control.

[Xavier] didn’t want to compromise on a mobile soldering iron, so he made a desktop version portable. His mobile temperature controlled soldering iron uses the same electronics that are found in inexpensive Hakko clones, and is powered by a LiPo battery.

The soldering station controller comes directly from eBay, and a DC/DC boost converter accepts just about any DC power supply – including an XT60 connector for LiPo cells. A standard Hakko 907 iron plugs into the front, and a laser cut MDF enclosure makes everything look great. There were a few modifications to the soldering station controller that involved moving the buttons and temperature display, but this build really is as simple as wiring a few modules together.

With an off-the-shelf LiPo battery, the iron heats up fast, and it doesn’t have a long extension cord to trip over. With the right adapter, [Xavier] can use this soldering station directly from a car’s cigarette power port, a great feature that will be welcomed by anyone who has ever worked on the wiring in a car.

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9th Grader Arrested, Searched For Building A Clock

A 14-year-old in Dallas, Texas has been arrested for bringing a clock to his school. [Ahmed Mohamed] could be any one of us. He’s a tinkerer, pulling apart scrap appliances and building projects from the parts. He was a member of the his middle school robotics team. The clock was built from a standard four digit seven segment display and a circuit board. [Ahmed] built the circuit inside a Vaultz hard pencil case like this one. He then did what every other experimenter, inventor, hacker, or maker before him has done: He showed off his creation.

Unfortunately for [Ahmed] one of his teachers immediately leapt to the conclusion that this electronic project was a “hoax bomb” of some sort. The police were called, [Ahmed] was pulled out of class and arrested. He was then brought to a detention center where he and his possessions were searched. [Ahmed] is now serving a three-day suspension from school. His clock is considered evidence to be used in a possible criminal case against him.

If this situation doesn’t get your blood boiling, then we don’t know what does. Not only is there a glaring racial issue here, but also an issue of allowing kids to bring their projects to school. We hope you’ll join us in expressing outrage at this whole debacle, as well as supporting [Ahmed] in any way you can. Let’s join together as a community to make sure a few small-minded individuals don’t break the spirit of this budding hardware hacker.

For anyone out there who would like to support [Ahmed]’s education even when his school won’t, [Anil Dash] is will be in contact with the family later today. We’re offering a gift card for the hackaday store and we would assume other contributions would also be welcome. -Ed.

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