ScottCar is a go-kart for a special Kid and is [Alain]’s entry in this years Hackaday Prize. Will it race to victory?
The concept behind ScottCar is simple: There isn’t much out there for disabled kids when it comes to go-karts. [Alain Mauer] has an autistic son who isn’t quite capable of driving a Go-Kart as he would have trouble using pedals and brakes. He didn’t let that stand in his way, so he built a go-kart for his 11-year-old son. It incorporates an automatic braking system. In situations where the kart speeds up going down, brakes are automatically applied, slowing it down to a normal pace. It also features a remote emergency brake which would avoid crashes while supervising playtime. The braking system uses bike disc brakes controlled by an Arduino Nano. A Siemens Motor with a screw drive is what propels the vehicle, powered by a 12V Battery with a healthy 7.5Ah capacity.
The project is being released under GNU General Public License version 3, Will we be seeing ScottCar racing towards the Hackaday prize?
YouTuber [RimstarOrg], AKA Hackaday’s own [Steven Dufresne], shows how to make a DIY inductor for a specific inductance. This is obviously a great skill to learn as sometimes your design may call for a very accurate inductance that may be otherwise hard to find.
Making your own inductor may seem daunting. You will have to answer a few questions such as: “what type of core will I use?”, “how many turns does my coil need?”, or “how do I calculate these parameters to create the specific inductance I desire?”. [RimstarOrg] goes through all of this, and even has a handy inductance calculator on his website to make it easier for you. He also provides all the formulae needed to calculate the inductance in the video below.
Using a DIY AM Radio receiver, he demonstrates in a visual way how to tune an AM Radio with a wiper on his home-built coil. Changing the inductance with a wiper changes the frequency of the radio: this is a variable inductor,
This video is great for understanding the foundations of inductors. While you may just go to a supplier and buy yours, it’s always great to know how to build your own when you can’t find a supplier, or just can’t wait.
Continue reading “Design a Coil for a Specific Inductance”
[Kasyan TV] shows us how to make a really simple DIY induction soldering iron complete with DIY soldering tips.
This is a pretty cool project. Most of us are used to temperature controlled ceramic heating elements, but there are other ways to get those irons up to temperature. Using scraps from older, presumably broken, soldering irons and some pieces of copper and iron along with a thermocouple for temperature management, [Kasyan TV] manages to throw together an Inductively heated soldering iron. To insulate the coil from the iron they use Kapton tape. The video goes on to show how to make your own induction iron, although missing is a power supply. We are sure a quick eBay search for an induction heater module should bring up something suitable to power the iron, or you could just wait and watch the their next video that will go over power supplies. The soldering tips are simply made from thick copper wire sculpted into the correct shape.
There are advantages to using a soldering iron like this, for example they are pretty durable and will take a knock or two, Our concern is that magnetically sensitive parts may not be happy, and the iron might destroy what you are trying to build. Either way we’ve put the video below the break, so take a look.
Hackaday has featured a few different DIY soldering irons and some pretty cool DIY Soldering Stations over the years. What is your soldering iron of choice and why?
Continue reading “DIY Induction Soldering Iron”
Counterfeit parts are becoming increasingly hard to tell the difference from the real deal, the technology used by the counterfeiters has come on leaps and bounds, so even the experts struggle to tell the real product from a good fake. Mere fake branding isn’t the biggest problem with a counterfeit though, as ieee.com reports, counterfeit parts could contain malware or be downright dangerous.
Way back in 2014 the FBI charged [Marc Heera] with selling clones of the Hondata S300, a plugin engine module for Honda cars that reads sensors, and depending on their values can change idle speed, air-fuel mixture and a plethora of other car/engine related settings. What, might you ask, is the problem, except they are obviously not genuine parts? According to Honda they had a number of issues such as random limits on engine rpm and occasionally failure to start. While the fake Hondata S300 parts where just poor clones that looked the part, anything connected to an engine control unit brings up huge safety concerns and researchers have shown that through ECU access, they could hijack a car’s steering and brakes.
It’s not just car parts being cloned, remember the fake USB-to-serial chips of FTDI-Gate? Entire routers are also being cloned, which doesn’t sound too bad until you realise that the cloners could configure your internet traffic to be redirected through their network for snooping. In 2010 Saudi citizen [Ehab Ashoor] was convicted of buying cloned Cisco Systems gigabit interface converters with the intention of selling them to the U.S Dept of Defense. While nothing sinister was afoot in [Ashoor]’s case other than greed, these routers were to be deployed in Iraq for use by the Marine Corps networks. They were then to be used for security, transmitting troop movements and relaying intelligence from field operations back to HQ.
So who are the cloners and why are they doing it? It is speculated that some of them may be state funded, as there are a lot of countries who do not trust American silicon. Circuits are reverse engineered and find their way to the international market. Then just like the FTDI-Gate case, cloners want to make profits from others intellectual property. This also brings up another question, if there is a mistrust of American silicon, nearly everything is made in China these days so why should we trust anything from there? Even analog circuits can be made to spy on you, as you can see from the piece we recently featured on compromising a processor using an analog charge pump. If you want to defend yourself from such attacks, perhaps look at previous Hackaday Prize finalist, ChipWhisperer.
Sony loves to have control of their own media formats: Beta, DAT, Minidisc, MemoryStick, Universal Media Disc, MemoryStick Micro, and more. When they released the PS Vita they used a format that was similar in shape to SD but not compatible. The higher capacity ones can be quite costly, However [thesixthaxis] Report there is a PS Vista Micro SD hack on the way.
PS Vita hacker [Yifan Lu]’s adapter replaces the 3G modem, allowing end users to plug a MicroSD card in its place. And this means using standard MicroSD memory cards instead of Sony’s overpriced proprietary memory. This is the coolest PS Vita hack since PS Vita’s Final Fantasy X.
Sounds like good news all round? Well, there are a few small caveats. In order to use the hack you need a 3G-capable Vita running HENkaku which means running firmware 3.60 or under. The adapter is still in prototype stage, but it’s available from the fully-funded Indiegogo campaign if you’re interested.
Doctors use RF signals to adjust pacemakers so that instead of slicing a patient open, they can change the pacemakers parameters which in turn avoids unnecessary surgery. A study on security weaknesses of pacemakers (highlights) or full Report (PDF) has found that pacemakers from the main manufacturers contain security vulnerabilities that make it possible for the devices to be adjusted by anyone with a programmer and proximity. Of course, it shouldn’t be possible for anyone other than medical professionals to acquire a pacemaker programmer. The authors bought their examples on eBay.
They discovered over 8,000 known vulnerabilities in third-party libraries across four different pacemaker programmers from four manufacturers. This highlights an industry-wide problem when it comes to security. None of the pacemaker programmers required passwords, and none of the pacemakers authenticated with the programmers. Some home pacemaker monitoring systems even included USB connections in which opens up the possibilities of introducing malware through an infected pendrive.
The programmers’ firmware update procedures were also flawed, with hard-coded credentials being very common. This allows an attacker to setup their own authentication server and upload their own firmware to the home monitoring kit. Due to the nature of the hack, the researchers are not disclosing to the public which manufacturers or devices are at fault and have redacted some information until these medical device companies can get their house in order and fix these problems.
This article only scratches the surface for an in-depth look read the full report. Let’s just hope that these medical companies take action as soon as possible and resolve these issue’s as soon as possible. This is not the first time pacemakers have been shown to be flawed.
YouTube User [Vuaeco] has come up with a novel idea, combining power tool battery packs to double the capacity.
Starting off with two slimline 2.0Ah compact battery packs, [Vuaeco] wanted a larger 4.0Ah rebuilt drill battery pack. These battery packs are different in size so it wasn’t just a case of adding in more cells in empty slots, instead he goes on to show us how to connect the batteries in parallel using some thin nickel strips. Once completed he modifies the battery casing so it fits another stack of batteries. He does this by bolting the top and bottom together with long screws, and insulating the otherwise exposed battery terminals with insulating tape. The final product isn’t as aesthetically pleasing as a real battery pack, but it looks good enough.
There are a few things we might have done differently, for instance providing some hard plastic around the insulation so should the battery get knocked in an awkward position it would still have a hard shell protecting it. Also, instead of combining the batteries together fully charged as the video suggests, we might have done the opposite approach and fully drained them, avoiding unnecessary risks. If you try this, how about giving it a 3D printed case?
Continue reading “Doubling The Capacity of Power Tool Batteries”