Controlling the power with bluetooth

[Mike] dropped us a tip to show off a system he has built to control some power sockets based on his proximity.  Initially the project started as a parallel port controlled box to switch the mains power.  Then he got the idea of turning this into a little more interactive of an automation tool. He is utilizing the bluetooth from his cell phone as a locator. When the box senses that he’s in the room, the power is on. When he leaves the area, the power is off.  You can see his ruby code on his web site if you wanted to give it a try or offer improvements.

Hacking the trampofoil to be pedal powered

We’ve seen a few different versions of the “trampofoil” before. That’s the contraption that utilizes a hydrofoil and human power to scoot you across the water above the surface. It is somewhat difficult to explain, so just check out the first video after the break to see how the original works.

Today, we stumbled upon a cool video where someone is attempting to make a pedal powered one instead. Their first prototype, shown above is literally just a trampofoil with an added seat and pedal powered prop. They did manage to take it a step further though and came up with a second prototype that has a better designed hydrofoil as well as using a bike frame for the main structure. This looks really fun as you can see in the second video below.

[Read more…]

OBD-II TrckrX: data logging in a BMW E36 M3

[Bruce Land] sent in this cool final project for ECE 4760 at Cornell University. Dubbed TrckrX, it is an OBD-II tracking and data logging system built into a BMW E36 M3. The car in question is being used in some auotocross competitions. The driver wanted instant access to some data as well as a log of everything for later analysis. The unit gives a real time display of vehicle speed, coolant temp, and RPM. G-force and timestamps are stored on the SD card.

We think this is a very cool idea, and could be quite useful in some instances. The real time display of speed and RPM seem a bit peculiar as the car’s speedometer and tachometer are more appropriately placed for real time information. However, we completely understand that this was a class project and this person may not have wanted to replace their dash cluster with a new readout.

Hackerspaces and Hackaday

It should really go without saying that Hackday LOVES hackerspaces. We want to support hackerspaces to the best of our ability. There have been many ideas tossed around, like a hackerspace directory, or hackerspace calendar of events, project lists, tool exchange programs, etc. For the short term, we can’t implement either of those in a smooth enough fashion that we think it would beneficial. There are several Hackerspace directories out there, with hackerspaces.org seeming to be the most up-to-date. We even have an “events” area in our forums, though we feel there could be a much better format or delivery device than a forum for that kind of information.

So what can Hackaday do to start helping? Well, the first small step could be to share more information about hackerspaces. We would like to do video tours of your hackerspace. Unfortunately, we don’t have a budget to travel around with a film crew and visit you all. I really wish we did, since I would probably be the one doing the traveling.  So what we can offer for now is that you film a tour, showing off some cool projects going on in your hackerspace, and we’ll share the video.  Contact me directly at Caleb@hackaday.com to work out the details. Your hackerspace doesn’t have to be a huge one in a big city. We want to help everyone here. If you have a few people gathered and a couple cool projects, we don’t care if you meet in someone’s basement. We want to see what the hacker community is doing!

Toward the end of May I will be spending a few days in Huntsville Al, then a few days in Hilton Head Island SC. I’d love to visit a hackerspace or two while I’m there to do a quick video tour. Again, contact me directly if you’re in those areas.

Sand casting motorcycle cases

Sand casting has been around since, well, since a really really long time ago. For thousands of years, people have been pouring molten metal into finely crafted sand casts, and there’s really no reason that someone can’t do the same thing in their garage or workshop today. This article covers the process of sand casting new case parts for antique Indian motorcycles.  In this instance, the parts were not only very difficult to find, the author also wanted to modify the design completely.

Though there are a few terms that pop up with which we’re unfamiliar, the process seems pretty straightforward. You build a model of what you want, you create the sand cast from the model, you fill the cast with molten metal. Done. In some cases, depending on the level of precision needed, you may need some machining done afterward. However, in many cases things don’t have to be quite so exact.

[via Matthew Van Arsdale]

PiP-Boy 2000 build goes for function over form

 

[Daniel] wrote in to tell us about his PIP-Boy 2000 prototype. While most PIP-Boy remakes we’ve seen tend to be focusing more on the aesthetic side, like a prop, [Daniel] is attempting to make a functional one. He has included a GPS sensor, RFID reader,  and radiation detector in his build but did choose to stick with the familiar PIP-Boy visual theme in the menus. He has a very long way to go if he wants it to do everything the PIP-Boy from Fallout did, but his list of semi-functional features is growing steadily.

Currently there are the basic functions of:

  • automapping and waypoint navigation
  • external PC interface
  • inventory status and item recognition (using RFID)
  • player experience (adds experience as you go to new locations)
  • ambient radiation
  • screensaver

Let us know when you get that sucker to stop time [Daniel]