Looking Inside the Arksen Dual Power Supply

I recently picked up an Arksen dual power supply. You’ve seen these before, I’m sure, under a variety of names in places ranging from electronics stores to eBay. They look amazing for the price, and while I didn’t expect it to measure up to some of the pro supplies I have, I just wanted something to stick under my desk instead of having to move things to the bench or–worse–drag a heavy power supply over to my desk.

When I was putting together the sonic motion sensor, I found that the HC-SR04 module needed more current than I could draw out of an Arduino Leonardo. I figured this would be a good chance to use the new supply in anger. It seemed to work without too many problems. But there were a few things you might want to know if you have a similar supply or are thinking about getting a similar one.

Continue reading “Looking Inside the Arksen Dual Power Supply”

Hollywood Finally Gets Hacking Right with Mr. Robot

Author’s note: I’m keeping spoilers out of this article, but they will surely show up in the comments.

A few weeks ago I started hearing about a new show on the USA network, Mr. Robot. The synopsis for the show was “Mr. Robot is a psychological thriller that follows a young programmer who works as a cyber-security engineer by day and a vigilante hacker by night.” Yeah, that sounds like another Hollywood crapfest. Cue crazy GUIs and virtual reality flybys representing hacking scenes. After watching the pilot though, I realized I couldn’t have been more wrong. I was hooked for the entire 10 week first season.

elliot-hacksLet’s start with the hacking, which is the whole reason this article is here on Hackaday. Show creator [Sam Esmail] isn’t a hacker himself, but he is tech savvy enough to see how poorly hacking has been portrayed on TV and in the movies. He knew he could do it better. The solution was good consultants, in the form of [Michael Bazzell] and others. The team helped shape the show into a rather realistic portrayal of hacking techniques. Elliot Alderson (Rami Malek), the main character, is the “vigilante” hacker described in the synopsis. Within the first 10 minutes of the pilot, he is turning a child pornographer in to the police. How does he catch the creeper? Tor exit node exploits, of course.

The onion routing protocol is not as anonymous as you think it is. Whoever’s in control of the exit nodes is also in control of the traffic, which makes me the one in control.

This is an accurate description of some of the exploits which have been demonstrated on the tor network. There aren’t any VR hacking scenes to be found either. In fact, several characters watch and make fun of the “flu shot” scene in Hackers. In this show, the command line isn’t hidden, it’s celebrated. We see every command the characters type, from netstat to CAN bus dumps. In one scene, Elliot even fires up a windows virtual machine so he can run DeepSound on his Kali Linux box.

The hacking isn’t all software either. Everyone’s favorite Linux single board computer is featured prominently in the first season. We can’t knock a show where a character looks at another and says “Ok, we all know what a Raspberry Pi is, what’s your point?”

Continue reading “Hollywood Finally Gets Hacking Right with Mr. Robot”

A Tale of Two Browser PCB Tools

We live in a golden age of free Electronic Design Automation (EDA) tools. It wasn’t that long ago that an engineering workstation was an expensive piece of hardware running very expensive software that typically had annual fees. Now, you can go to your local electronics store and buy a PC that would shame that old workstation and download plenty of software to design schematics, simulate circuits, program devices, and lay out PCBs.

The only problem with a lot of this free software is it runs on Windows. I do sometimes run Windows, but I most often use Linux, so there is a certain attractiveness to a new breed of tools that run in the Web browser. In particular, I wanted to look briefly at two Web-based EDA tools: EasyEDA and MeowCAD. Both offer similar features: draw a schematic, populate a PCB, and download manufacturing files (that is, Gerber files). EasyEDA also offers SPICE simulation.

Continue reading “A Tale of Two Browser PCB Tools”

$50 Multimeter Comparison and Teardown

We remember when buying even a modest digital multimeter was a big investment. These days, you can find tool stores giving away cheap meters and if you are willing to spend even a little money, you can buy a meter with tons of features like capacitance, temperature, and other measurements.

Like most things, though, you can pay a little money for a bargain, or you can overpay for a dud. To help you pick, [TechnologyCatalyst] decided to do an extensive video review of 15 different meters in the under $50 price category.

If you are looking for a quick video to watch, you might want to move along. The review is in nine videos ranging from an introduction, to a comparison of build quality, discussion about the displays on each meter, and, of course, the measurement capability of each meter. There’s even a video that shows tear downs so you can see inside the instruments.

Continue reading “$50 Multimeter Comparison and Teardown”

BeagleBone Green Hands-On: Lower Price, Same Horsepower

Although the BeagleBone Green was announced at the Bay Area Maker Faire last May, there hasn’t been much said about it on the usual forums and IRC channels. Now, it’s finally out and I got my hands on one of them. Through a cooperation between the BeagleBoard foundation and Seeed Studios, the best small Linux board for doing real work with small Linux boards is now cheaper, a little more modern, and green.

The BeagleBone Green is an update to the venerable BeagleBone Black, the dev board based on a TI ARM Cortex-A8. It’s an extremely capable machine with a few interesting features that make it the perfect device for embedded applications. With the BeagleBone Green, the BB Black gets a small hardware refresh and a drastic reduction in price. If you want to do real work on a Linux board, this is the one to get. Check out the review below for everything that’s been updated, everything that’s the same, and why this is one of the most interesting developments in small Linux boards in recent memory.

Continue reading “BeagleBone Green Hands-On: Lower Price, Same Horsepower”

Review: Single Board 65C02 and 65C816 Computers

The 6502 is a classic piece of computing history. Versions of this CPU were found in everything from the Apple ][, to the Nintendo Entertainment System, and the Commodore 64. The history of the 6502 doesn’t end with video games; for the last forty years, this CPU has found its way into industrial equipment, medical devices, and everything else that doesn’t need to be redesigned every two years. Combine the longevity of the 6502 with the fact an entire generation of developers first cut their teeth on 6502 assembly, and you have the makings of a classic microprocessor that will, I’m sure, still be relevant in another forty years.

The cathedral of The 6502 is Western Design Center. For more than 35 years, WDC has been the home of 6502-related designs. Recently, WDC has been interested in the educational aspects of the 6502, with one of the VPs, [David Cramer], lending his time to an after-school club teaching opcodes.

The folks at WDC recently contacted me to see if I would give their hardware a close look, and after providing a few boards, this hardware proved to be both excellent. They’re great for educators adventurous enough to deviate from the Arduino, Processing, and Fritzing zeitgeist, and for anyone who wants to dip their toes into the world of 65xx development.

Continue reading “Review: Single Board 65C02 and 65C816 Computers”

Review: Microchip Curiosity is a Gorgeous New 8-bit Dev Board

Microchip has unveiled a new dev board called the Curiosity Development Board. I had my first look at this at Bay Area Maker Faire back in May but was asked not to publicize the hardware since it wasn’t officially released yet. Yesterday I got my hands on one of the first “pilot program” demo units and spent some time working with it.

I requested a sample board out of my own curiosity. As you may know, Microchip is one of the sponsors of the 2015 Hackaday Prize, but that partnership does not include this review. However, since we do have this relationship we asked if they would throw in a few extra boards that we could give away and they obliged. More about that at the end of the post.

Continue reading “Review: Microchip Curiosity is a Gorgeous New 8-bit Dev Board”