A few weeks ago, Anonabox, the ill-conceived router with custom firmware that would protect you from ‘hackers’ and ‘legitimate governments’ drew the ire of tech media. It was discovered that this was simply an off-the-shelf router with an installation of OpenWrt, and the single common thread in the controversy was that, ‘anyone can build that. This guy isn’t doing anything new.’
Finally, someone who didn’t have the terrible idea of grabbing another off the shelf router and putting it up on Kickstarter is doing just that. [Adam] didn’t like the shortcomings of the Anonabox and looked at the best practices of staying anonymous online. He created a Tor dongle in response to this with a Beaglebone Black.
Instead of using wireless like the Anonabox and dozens of other projects, [Andy] is using the Beaglebone as a dongle/Ethernet adapter with all data passed to the computer through the USB port. No, it doesn’t protect your entire network; only a single device and only when it’s plugged in.
The installation process is as simple as installing all the relevent software, uninstalling all the cruft, and configuring a browser. [Adam] was able to get 7Mb/sec down and 250kb/sec up through his Tor-ified Ethernet adapter while only using 40% of the BBB’s CPU.
The BeagleBone Black has been featured in an improbable number of awesome project, ranging from driving thousands of LEDs for a video display, to 3D printer controller boards. There’s a lot you can do with a tiny Linux board that’s much more powerful than the Raspberry Pi – if you can find one, that is. The BeagleBone Black has been out of stock everywhere for months now, with little sign of when distributors will receive some new stock.
Luckily, the BeagleBone Black is open source. Anyone can make them. Finally, someone did. It’s called Blue Steel, and notwithstanding the inevitable Zoolander references, it’s pretty much the same as the BeagleBone Black we all know and love.
There are a few differences between Blue Steel and the BeagleBone Black: Blue Steel doesn’t have an HDMI output, and the 4GB of on-board Flash featured on the BeagleBone isn’t found on Blue Steel. Still, it has the same processor, same amount of RAM, and the same connectors found in the BeagleBone Black.
You can pre-order Blue Steel here, with the boards eventually shipping at the end of the month. It’s the same price as the BeagleBone Black, not ideal considering the missing HDMI port and Flash storage. Still, you can actually buy it now, something you can’t say about the BeagleBone.
The BeagleBone Black, with an impressive amount of computing power and a whole bunch of I/O, would make an impressive CNC controller, save for two shortcomings: The BBB isn’t in stock anywhere, and CNC capes are a little on the pricey side. [Marc Peltier] can’t do anything about finding a distributor that doesn’t have the BeagleBone on backorder for you, but he did come up with an adapter for the very popular RAMPS-FD 3D printer controller board (Forum, French, Here’s the Google translation matrix).
The RAMPS-FD is an extension of the RAMPS board and a shield for the Arduino Due. Both the Due and BBB work on 3.3 V, meaning controlling the RAMPS-FD is simply a matter of finding the correct wiring diagram and pin assignments on the BeagleBone. [Marc] solved this problem by using the settings from the BeBoPr cape and using the existing BeBoPr LinuxCNC configuration.
The end result of [Marc]’s tinkering is something a lot like [Charles Steinkueler]’s CNC capes for the BeagleBone Black we saw at the Midwest RepRap Fest. [Charles] isn’t selling his capes, but no one else seems to be selling BeagleBone Blacks, either.
Continue reading “BeagleBone Black + RAMPS”
This is 6,144 RGB LEDs being controlled by a BeagleBone Black and a FPGA. This gives the display 12 bit color and a refresh rate of 200 Hz. [Glen]’s 6 panel LED wall uses the BeagleBone Black to generate the image, and the LogiBone FPGA board for high speed IO.
[Glen] started off with a single 32 x 32 RGB LED panel, and wrote a detailed tutorial on how that build works. The LED panels used for this project have built in drivers, but they cannot do PWM. To control color, the entire panel must be updated at high speed.
The BeagleBone’s IO isn’t fast enough for this, so a Xilinx Spartan 6 LX9 FPGA takes care of the high speed signaling. The image is loaded into the FPGA’s Block RAM by the BeagleBone, and the FPGA takes care of the rest. The LogiBone maps the FPGA’s address space into the CPU’s address space, which allows for high speed transfers.
If you want to drive this many LEDs, you’ll need to look beyond the Arduino. [Glen]’s work provides a great starting point, and all of the source is available on Github.
[Thanks to Jonathan for the tip]
[Babak] created an in-depth tutorial on how he got his BeagleBone Black to control a servo from a web browser.
[Babak] configured a pin on his BeagleBone Black (BBB) as a PWM line and connected it to the control line on a micro hobby servo. The BBB is running a Node.js web server that displays a simple web page to control the servo. The browser sends a WebSocket request to a small WebSocket node server also running on the BBB that then writes the appropriate PWM value to the pin connected to the servo.
The code for node WebSocket server and web server can be found on his GitHub page. There is also a small node library to control PWM lines on the BBB. Though the end result is simple, controlling the servo can be done from any browser that can make a network connection to the BeagleBone Black. Check out the video after the jump for a description and demonstration.
Continue reading “Web Controlled Servo From A BeagleBone Black”
For both the Raspberry Pi and BeagleBone Black, there’s a lot of GPIO access that happens the way normal Unix systems do – by moving files around. Yes, for most applications you really don’t need incredibly fast GPIO, but for the one time in a thousand you do, poking around /sysfs just won’t do.
[Chirag] was playing around with a BeagleBone and a quadrature encoder and found the usual methods of poking and prodding pins just wasn’t working. By connecting his scope to a pin that was toggled on and off with /sysfs he found – to his horror – the maximum speed of the BBB’s GPIO was around three and a half kilohertz. Something had to be done.
After finding an old Stack Overflow question, [Chirag] hit upon the solution of using /dev/mem to toggle his pins. A quick check with the scope revealed he was now toggling pins at 2.8 Megahertz, or just about a thousand times faster than before.
[Bart] Wanted to try controlling a CNC with his BeagleBone black, but didn’t want to invest in a CNC Cape. No problem – he created his own translator board for RAMPS. LinuxCNC for the BeagleBone Black has been available for a few months now, and [Bart] wanted to give it a try. He started experimenting with a single stepper motor and driver. By the time he hooked up step, direction, and motor phases, [Bart] knew he needed a better solution.
Several CNC capes are available for the BeagleBone boards, but [Bart] had a RAMPS board just sitting around, waiting for a new project. Most RepRap fans have heard of the RAMPS – or Reprap Arduino Mega Pololu Shield. In fact, we covered them here just a few days ago as part of our 3D Printering series. RAMPS handle all the I/O needed for 3D printing, which carries over quite nicely to other CNC applications as well. The downside is that they’re specifically designed for the Arduino Mega series. Continue reading “BeagleBone Black Does CNC With RAMPS”