Author: Mike Szczys

6403 Articles

Electronic Ruler Works Out Logic Truth Tables

October 13, 2015 by 23 Comments

Like [Brad], we’ve seen a number of PCB rulers out there. [Brad] was looking to take the idea and run with it. His DigiRule is a ruler with a logic gate simulator. What he built is a mash-up between PCB rulers, and the concept of electronic business cards.

All told it simulates seven logic gates, four flip-flops, and includes a four-bit counter. On one end of the ruler a CR1220 battery feeds the 18F43K20 which is performing the logic operations using buttons and LEDs. Of course the truth tables are printed on the back silk-screen, but playing with the lights is a lot more fun. We do find it fairly amusing that the centimeters on the bottom of the ruler are notated in binary.

It makes a lot more sense to hand out rulers than business cards; people might actually use them after you leave and you can still include contact info. This form-factor also breaks the mold. You can have a lot more space on a ruler and you’re not constrained by thickness (although [Limpkin] solved that problem). While we’re on the topic of business cards [ch00f’s] USB etch-a-sketch style card and this logic-based information delivery device top our favorites list.

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Hackaday SuperConference — Apply Now To Attend

October 12, 2015 by 37 Comments

In the beginning there were simple circuits, and it was good. Our technology has advanced, our hardware prowess must advance in kind. The Hackaday SuperConference is the hardware con you’ve been waiting for. Experience spectacular presentations that move hardware creation forward while being surrounded by inspired hackers, designers, and engineers.

There are numerous serious professionals in the Hackaday Community pulling off amazing things that easily rank as world-class. It’s time to assemble our talent and spread those skills to others looking to grow their own repertoire. This is practical, hands-on learning. Many of the sessions will be workshops where you will manipulate registers and send solder smoke skyward.

Apply to Attend the Hackaday SuperConference

The Hackaday SuperCon is in San Francisco, November 14th and 15th. There is limited capacity. You must apply to be part of something this amazing. Do it now and unlock the early adopter rate of $64. Over the coming days that price will rise to $256. That’s assuming there are any tickets left after today. Those who want to hedge their bets should also apply as a volunteer.

You could procrastinate. You could let this one pass you by. But we know you’re like us and you’ve been disappointed by the lack of real hardware talks and workshops at conferences. The SuperCon is created for hardware. Your wait for something special is over.

We are still accepting proposals to present a talk or workshop at the SuperCon. Submit your proposal by this Wednesday. Travel stipends are available for outstanding proposals.

Download the SuperCon poster and hang it everywhere. Share the @hackaday #SuperCon.  Do it now.

[Bunnie Huang’s] Hardware Talks Top Your Watch List

October 7, 2015 by 14 Comments

When [Bunnie] talks, we listen. He is a fount of product engineering knowledge, having seen many of his own products through from concept to market, and frequently helping others do the same. Of course having the knowledge is one thing, but he is also an accomplished speaker who knows what is important and how to share it in a way which is meaningful to others. The latest example of this is a pair of Engineering Talks he gave at Highway 1.

It’ll take you less than twenty minutes to get through the two videos. The first focuses on documentation for manufacturing. What do you need to include on a bill of materials sent to the factory? [Bunnie] has a set of gotchas which illustrate how vital this is. He also discusses how to handle design changes once the manufacturing wheels are already in motion. The second clip covers how Design for Manufacture relates to the actual cost of a production run. We hope there are more of these clips in the publishing pipeline so we’re keeping our eye on this channel.

The two videos are embedded below and at the time of writing had just a couple dozen views each and only one comment between the two of them. It seems sacrilege to say this, but we agree with that YouTube comment; these videos are gold.

Want to check out one of [Bunnie’s] latest projects? It’s a radio-based interactive badge.

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10 Finalist Projects Prove We Can Save The World

October 5, 2015 by 14 Comments

People should build something that matters. The ones who actually do so end up shaping the world. We are proud to announce the ten finalists for the 2015 Hackaday Prize.

The problems that these projects tackle come from many different angles. Some improve safety in extreme situations by giving emergency workers the ability to detect the presence of dangerous gases, or by helping to find unexploded munitions in war-torn areas. Others make improvements in transportation by working on transportation where infrastructure is poor, and looking toward the future of electric vehicle transportation. There are projects that tackle pollution through monitoring and also by scrubbing pollutants from indoor air. Improvements in wheelchair mobility and advancements in prosthetics can transform the lives of people living with loss of function. And feeding the world can start with more automated farming options, and becoming more efficient with farming methods. These are the problems the finalists have chosen to solve with their entries.

The Hackaday Prize challenges Hackers, Designers, and Engineers to solve a problem and to build their solution using Open Design. One of these ten will claim the Grand Prize of a trip into space, and four others will claim top prizes worth $5,000-$10,000 each. These distinctions, along with the $100,000 Best Product prize, will be awarded to one of these ten projects at the Hackaday SuperConference in San Francisco on November 14th and 15th.

Thank you to our expert judges who chose these finalists from a slate of 100 semifinalists. The judges will begin making final round decisions on October 26th so keep watching these finalists as they continue to develop their entires.

To all who submitted entries this year, great job! The nature of this contest means not everyone can move to the next round, but that doesn’t diminish the effort and potential for good your project represents. The full slate of entries can be found in this list and all Semifinalists are shown here. Please also check out the Best Product entries and finalists.

Sensor Net Makes Life Easier For Rice Farmers

October 5, 2015 by 48 Comments

Rice is cultivated all over the world in fields known as rice paddies and it is one of the most maintenance intensive crops to grow. The rice paddy itself requires a large part of that maintenance. It is flooded with water that must be kept at a constant level, just below the height that would keep rice seedlings from growing but high enough to drown any weeds that would compete with the rice stalks for nutrients. This technique is called continuous flooding and a big part of the job of a rice farmer is to inspect the rice paddy every day to make sure the water levels are normal and there are no cracks or holes that could lead to water leakage.

This process is labor intensive, and the technology in use hasn’t changed much over the centuries. Most of the rice farmers in my area are elders with the approximate age of 65-70 years. For these hard working people a little bit of technology can make a big difference in their lives. This is the idea behind TechRice.

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Hackaday SuperConference Call For Proposal

October 4, 2015 by 12 Comments

We’ve been keeping pretty quiet about the Hackaday SuperConference, but rest assured a full-blown announcement is on the way soon. For now we need your help getting the word out to presenters. Do you have a favorite hardware designer, hacker, or project? Get to work convincing them to Submit a Talk or Workshop proposal for the Hackaday SuperConference. Of course if you yourself fall into one of these categories, consider this your invitation to submit! Proposals are due October 10th.

The Hackaday SuperConference is the hardware con you’ve been waiting for. The two-day event will be held in San Francisco on November 14th and 15th. It features workshops and talks on hardware creation with topics like hardware engineering, creativity in technical design, product design, and prototyping. The winner of the 2015 Hackaday Prize, Best Product, and runners-up will be announced at the SuperCon.

The 2015 Hackaday Prize is sponsored by:

Navigating The Oceans Is Deadly Without A Clock

September 28, 2015 by 66 Comments

I came across an interesting question this weekend: how do you establish your East/West location on the globe without modern technology? The answer depends on what you mean by “modern”, it turns out you only have to go back about three centuries to find there was no reliable way. The technology that changed that was a clock; a very special one that kept accurate time despite changing atmospheric conditions and motion. The invention of the Harrison H1 revolutionized maritime travel.

We can thank Andy Weir for getting me onto this topic. I just finished his amazing novel The Martian and I can confirm that George Graves’ opinion of the high quality of that novel is spot on. For the most part, Andy lines up challenges that Mark Watney faces and then engineers a solution around them. But when it came to plotting location on the surface of Mars he made just a passing reference to the need to have accurate clocks to determine longitude. I had always assumed that a sextant was all you needed. But unless you have a known landmark to sight from this will only establish your latitude (North/South position).

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