Crazyman [Colin Furze] is back, and this time he’s setting everything on fire with his Pyro gloves. Though Hackaday readers are already a discerning bunch, this is a build we get submissions for all the time and feature fairly often. It would take an exceedingly impressive build to outshine the other fire hazards. But, as with his pneumatic Wolverine claws and his electromagnetic boots, [Furze] knows how to build the insane and then put on a good show.
The Pyro build is part of [Furze’s] 3-part celebratory X-Men extravaganza, a nod to the realm of superheroes coinciding with the release of the new X-Men film. [Furze] began with a custom reservoir cylinder that fitted with two solenoid valves: one for a pilot light and another for the big blasts. He’s also affixed a Piezo element and a AA battery, which sits in a cozy little container. The bulkier bits of the assembly sit in a backpack, hooking up, as expected, to the wrist-mounted devices. This flame cannon, however, is unique among the ones we’ve encountered here.
Continue reading “[Furze] Sets Fire to Everything with Pyro Gloves”
We spent a little bit of time at the TI booth at Maker Faire to film a pair of interviews. The first is with [Bill Esposito] who is grinding away on his PhD. at Stanford. He’s showing off an Analog Shield for Arduino. He describes it as “an attempt to bring the analog bench to an Arduino shield”. We think this is a fantastic idea as most who are learning digital electronics through Arduino have little or no experience with analog circuitry. This is a nice gateway drug for the concepts.
The analog shield has a supply good for +/- 7.5 volts, 4-channel ADC, 4-channel DAC, and gets 100k samples at 16-bits. He showed us a spectrum analyzer using Fast Fourier Transform on the incoming signal from a microphone. He also built a function generator around the shield. And finally a synthesizer which plays MIDI files.
In the second half of the video we take a look at [Trey German’s] work on a PCB-based quadcopter. His goal is to reduce the power consumption which will equate to longer flying times. To this end he chose the DRV8312 and a Piccolo to control each sensorless, brushless DC motor. The result should be 10% lower power consumption that his previous version.
Old infrared remote controls can be a great way to interface with your projects. One of [AnalysIR’s] latest blog posts goes over the simplest way to create an Arduino based IR receiver, making it easier than ever to put that old remote to good use.
Due to the popularity of their first IR receiver post, the silver bullet IR receiver, [AnalysIR] decided to write a quick post about using IR on the Arduino. The part list consists of one Arduino, two resistors, and one IR emitter. That’s right, an emitter. When an LED (IR or otherwise) is reverse biased it can act as a light sensor. The main difference when using this method is that the IR signal is not inverted as it would normally be when using a more common modulated IR receiver module. All of the Arduino code you need to get up and running is also provided. The main limitation when using this configuration, is that the remote control needs to be very close to the IR emitter in order for it to receive the signal.
What will you control with your old TV remote? It would be interesting to see this circuit hooked up so that a single IR emitter can act both as a transmitter and a receiver. Go ahead and give it a try, then let us know how it went!
To demonstrate how computers work, [Alex Gorischek] has made a physical example of how binary logic gates work using pulleys and weights.
For anyone who doesn’t know much about logic gates (Wikipedia), it’s a great lesson in one of the fundamentals of circuitry. Using an old chessboard, eyelets, rings, weights, and string, [Alex] has designed a system that can show off all of the logic gates. This includes: NOT, BUFFER, NAND, AND, OR, NOR, XOR, XNOR. He’s also included a gallery of all his examples here.
The neat thing about this demonstration is it is shown in a way that anyone can understand, heck, it’s also something anyone can play with in order to learn! Stick around after the break and see for yourself.
Continue reading “Using Pulleys and Weights to Explain Binary Logic Gates”
We went to “the dark room” at Maker Faire once more for an interview with [Sarah] of Robot-Army. She and [Mark], who handles software development for the project, were showing off 30 delta robots who know how to dance. Specifically they’re dancing in unison to the movements of another faire-goer. A Kinect sensor monitors those movements and translates them to matching motions from the deltabots.
You should remember seeing this project back in November. Now that the standards for this model have been worked out it was just a matter of sinking about three-weeks into assembling the army. We’re happy to see that the Kickstarter made it to 250% of the goal at the beginning of March, and with that there are even bigger plans. [Sarah] says the goal remains to fill a room with the robots and a we may even see a much larger version some day.
The interview is a bit short since the Robot-Army booth was right next to Arc Attack (hence the noise-cancelling headphones) and we had to try to get in and out between their ear-drum-shattering interruptions. But you can see a ton more about the project in this huge build log post over on Hackaday.io. Also check out the Robot-Army webpage. There’s a nice illustration of their adventures at MFBA and the foam Jolly Wrencher made it into the piece!
NFC tags are cool, but programming them to do your bidding – whether unlocking your computer, making an Arduino vending machine, or a smart home application – requires using an NFC device to program the tag over the air. An NFC tag programmable with any ‘ol microcontroller would certainly have some interesting applications, and Elecfreaks’ DNFC tag is just the thing to test out these ideas.
While NFC tags are reprogrammable, reprogramming them requires an NFC controller, be that through a dedicated hardware, a phone, or an Arduino shield. The DNFC tag is reprogrammable with a microcontroller with an I2C interface thanks to TI’s RF430CL330H dynamic NFC transponder IC. It still does everything you would expect from a NFC tag – MIFARE compatible. NDEF reading and writing, and everything else – but you can program it through an Arduino, Pi, or any other board with an I2C interface.
TI has an app note on using the chip inside the DNFC for automatic Bluetooth pairing, and Elecfreaks themselves have a few use cases in mind that include putting WiFi credentials on an Arduino board without putting the SSID in code and other Internet of Things™ applications. We’re thinking this is one of those devices that is eminently useful, but for something we just can’t think of off the top of your head. If you’ve got an idea for how to use an I2C programmable NFC tag, drop a note in the comments.
Elecfreaks is doing an Indiegogo campaign for the DNFC, $13 for one. I picked one up, but it’s flexible funding, so buy it or don’t. I don’t care.
Some of our more
senior experienced readers may remember a toy called the Spirograph. In case you don’t, it’s a geometric shape drawing toy. The way it works is a plastic disc with gear teeth around the perimeter and various holes on its face is spun around a plastic ring with gear teeth on the inside. A pencil is inserted in one of the holes in the disc and, when spun around the inside of the ring, draws different complex shapes called hypotrochoids.
This was fun enough to keep a kid entertained for a few minutes. It took a while to make a complete shape and sometimes it was easy to mess up (especially if the hole chosen for the pencil was near the outside of the disc). [Darcy] thought it would be neat to combine the Spirograph’s drawing style with modern technology. The result is called the Art-O-Matic and it draws some pretty wild art, you guessed it, automatically.
Click past the break for more!
Continue reading “Art-O-Matic Is Spirograph’s Young Hip Offspring”