ZMR250 Frame My first 250 size quadcopter frame was a ZMR250 which I have been told is a clone of a Blackout 250. The Blackout costs $150 from GetFPV while the ZMR is available for as low as $20 from various sources. I got my first one from Banggood in May 2015, it required some drilling to get the 2204 motors to fit the arms and the SMA VTx to fit through the top plate, but I was pretty happy with it overall. ...
Vortex 285 – FPV Race Quad The Vortex comes with 10 “Pro-Tunes” that were developed by sponsored pilots before its release. I did a bunch of Googling after buying the Vortex to try and find more details about these varoius tunes and found nothing more than a short video from UmmaGawd about the Vortex. So here are all the tunes as of October 2015. I hope they add some new ones soon that are specific to newer motor and prop combinations, especially DAL props. ...
Vortex 285 – FPV Race Quad I have seen a handful of people flying Vortexes around the Atlanta area and after rebuilding my ZMRs like 5 times I decided to give the Immersion Vortex a try. I bought it from Atlanta Hobby along with both the Carbon Fiber Crash Kit and the Plastic Crash Kit. I also got a cable to allow me to easily connect a Spektrum Satellite receiver without having to make a cable of my own. ...
Last year I saw a video of a guy flying a remote control helicopter upside down… A HELICOPTER… UPSIDE DOWN! I watched that video and others like it over and over. So I started saving my money and researching what kind of equipment I needed to learn how to do that myself. I started off with a cheap toy helicopter, then moved to a more expensive one that was much more powerful but still a toy and then finally with a hobby-grade collective pitch heli. ...
As you may have read in previous posts I studied and took the Amateur Radio Technician Exam recently, it was a great experience. I bought a study guide and read it on a Kindle and the iOS Kindle app then took around 100 practice exams using an iOS app. All told I spent about 5 days studying after work and at lunch. Using the National Association for Amateur Radio’s website I was able to find a local test which was on a Saturday morning at a local church around the corner from my house. ...
Amateur Radio Exam Prep: Technician is an iOS app for iPhone and iPad to help you pass the ham radio technician exam. I am taking the exam to get my license so that I can legally use 5.8GHz video transmitters for first-person view remote control flying. This app with a good study guide should easily get you through the technician exam. I read a study guide and took about 100 practice exams before taking the test and only missed 2 questions. ...
This is the Raspberry Pi book I have been looking for. Instead of trying to push some advanced scripting language or Linux distribution, this book shows you how to use the most widely used distribution, Raspbian, and good old Bash scripts to do useful things with a Raspberry Pi. Now 3 years old the lessons in Learn Raspberry Pi still hold up. Raspbian has been through some major updates and the new Model A+ and B+ computers have added to the Pi’s capabilities, but the Linux/Unix commands, SSH and VNC techniques, network information, Web Server installation (LAMP), and a decent chapter covering compiling XMBC on your Pi. ...
Boris, the BeagleBoard Logo MascotI initially bought an Edimax EW-7811Un Dongle for use with my BeagleBone Black (BBB), but after a lof of fiddling and frustration I gave up on it. Turns out that I may have been using the wrong setting in the interfaces file, but after some research I found many instances of people complaining about the Edimax dongles in general, so I started looking for solutions that others were having good luck with. ...
Unable to Connect to BeagleBone Black via Ethernet Everything works fine when the BeagleBone Black is connected to a computer via USB but when connected to the network via Ethernet it does not work. I ran into this issue when I first started using my BeagleBone Black out-of-the-box and again when I updated the OS to Debian. Here is the solution: Connect the BBB to your computer via USB and give it time to boot In a web browser open the Cloud9 IDE by going to https://192.168.7.2:3000/. You may be prompted to choose some settings, I like the defaults. Create a new file, paste in the script below, and run it var fs = require("fs"); var destroyed_key_file = "/etc/dropbear/dropbear_rsa_host_key"; fs.readFile(destroyed_key_file, function (err, data) { if (err) throw err; if( data===null || data.length===0 ) { console.log("we have a corrupted host key file... try do delete it"); fs.unlink(destroyed_key_file, function (err) { if (err) throw err; console.log("successfully deleted " + destroyed_key_file); console.log("you should now reboot your beaglebone."); console.log("the /etc/init.d/dropbear script will create a new rsa host key file for you."); console.log("after the reboot you should be able to login over ssh"); }); } else { console.log("it seems that you have another problem, sorry"); } }); Now shutdown, I like to sudo shutdown -hP now, the USR lights will all go out when it is shut down Now you can unplug the BBB from USB and plug in an Ethernet cable and power adapter. You should now be able to access the BBB from anywhere on your network using https://beaglebone.local or ssh beaglebone.log. Thanks to httpss://groups.google.com/forum/?fromgroups=#!msg/beagleboard/Ya2qE4repSY/u4lvOjF66JEJ
After updating the operating system to Debian and plugging in your BeagleBone Black via USB you may receive the error message: WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! This is normal as the RSA key has changed when you updated the OS. The easiest way to fix it is to run ssh-keygen -R then try connecting again. When connected via USB ssh-keygen -R 192.168.7.2 ssh [email protected] When connected via Ethernet ssh-keygen -R beaglebone.local ssh [email protected] ...