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Monthly Archives: January 2017
FPV drones are a fun but often costly hobby for beginners. Opting for a smaller drone will reduce the chance of damaging the drone when one invariably crashes and the smaller props are also a lot safer if there are any innocent bystanders. YouTuber and Instructables user  wanted a cheap FPV capable drone that they could comfortably fly in-and-out of doors, so of course they built their own.
Once the drone’s frame was 3D printed, the most complex part about soldering four small-yet-powerful 8.5 mm motors to the Micro Scisky control board is ensuring that you attach …read more
Many tools can be used either for good or for evil — it just depends on the person flipping the switch. (And their current level of mischievousness.) We’re giving [Callan] the benefit of the doubt here and assuming that he built his remote-controlled Residual Current Device (RDC) tripper for the purpose of testing the safety of the wiring in his own home. On the other hand, he does mention using it to shut off all the power in his house during an “unrelated countdown at a party”. See? Good and evil.
An RCD (or GFCI in the States) is a …read more
When I first got interested in computers, it was all but impossible for an individual to own a computer outright. Even a “small” machine cost a fortune not to mention requiring specialized power, cooling, and maintenance. Then there started to be some rumblings of home computers (like the Mark 8 we recently saw a replica of) and the Altair 8800 burst on the scene. By today’s standards, these are hardly computers. Even an 8-bit Arduino can outperform these old machines.
As much disparity as there is between an Altair 8800 and a modern personal computer, looking even further back is …read more
A serial backpack is really nothing more than a screen and some microcontroller glue to drive it. And a hammer is nothing more than a hardened weight on the end of a stick. But when you’re presented with a nail, or a device that outputs serial diagnostic data, there’s nothing like having the right tool on hand.
[ogdento] built his own serial backpack using parts on hand and a port of some great old code. Cutting up a Nokia 1100 graphic display and pulling a PIC out of the parts drawer got him the hardware that he needed, and he …read more
When [Zeke Gabrielse] needed to book a flight, the Internet hive-mind recommended that he look into traveling with Southwest airlines due to a drop in fares late Thursday nights. Not one to stay up all night refreshing the web page indefinitely, he opted to write a script to take care of the tedium for him.
Settling on Node.js as his web scraper of choice, numerous avenues of getting the flight pricing failed before he finally had to cobble together a script that would fill out and submit the search form for him. With the numbers coming in, [Grabrielse] set up …read more
Most old-school remote controlled cars broadcast their controls on 27 MHz. Some software-defined radio (SDR) units will go that low. The rest, as we hardware folks like to say, is a simple matter of coding.
So kudos to [watson] for actually doing the coding. His monster drift project starts with the basics — sine and cosine waves of the right frequency — and combines them in just the right durations to spit out to an SDR, in this case a HackRF. Watch the smile on his face as he hits the enter key and the car pulls off an epic …read more
Like a lot of mass-produced consumer goods, it turns out that the internal workings of Bluetooth headphones are the same across a lot of different brands. One common Bluetooth module is the CSR8645, which [lorf] realized was fairly common and (more importantly) fairly easy to modify. [lorf] was able to put together a toolkit to reprogram this Bluetooth module in almost all of these headphones.
This tip comes to us from [Tigox] who has already made good use of [lorf]’s software. Using the toolkit, he was able to reprogram his own Bluetooth headphones over a USB link to his computer. …read more
If you know me at all, you know I’m a car guy. I’m pretty green as far as hardcore wrenching skills go, but I like to tackle problems with my vehicles myself – I like to learn by doing. What follows is the story of how I learned a few hard lessons when my faithful ride died slowly and painfully in my arms over the final months of 2016.
For context, my beast of a machine was a 1992 Daihatsu Feroza. It’s a 4WD with a 1.6 litre fuel injected four-cylinder engine. It had served me faithfully for over a …read more
AvE shows us that you don’t always need a complex expensive setup to drive industrial equipment. A simple Arduino setup is shown here to perform some simple stepper manipulation. The Arduino is connected directly to the Stepper driver which handles all of the complex microstepping etc. All the Arduino needs to do is enable […] Continue reading
[Yannick], aka [Gigawipf] brings us this (mostly) musical delicacy: a 3D-printed siren that’s driven by a brushless quadcopter motor, and capable of playing (mostly) any music that you’ve got the MIDI score for. This is a fantastic quickie project for any of you out there with a busted quad, or even some spare parts, and a 3D printer. Despite the apparent level of difficulty, this would actually be a great quickie weekend build.
First stop is Thingiverse, for the Mini Air Raid Siren model. Start that printing and get to work on the electronics. For the MIDI-to-ESC (electronic speed controller) …read more