Most of the projects we feature on Hackaday are built for personal use; designed to meet the needs of the person creating them. If it works for somebody else, then all the better. But occasionally we may find ourselves designing hardware for a paying customer, and as this video from [Proto G] shows, that sometimes means taking the long way around.
The initial task he was given seemed simple enough: build a display that could spin four license plates around, and make it so the speed could be adjusted. So [Proto G] knocked a frame out of some sheet metal, and used an ESP32 to drive two RC-style electronic speed controllers (ESCs) connected to a couple of “pancake” brushless gimbal motors. Since there was no need to accurately position the license plates, it was just a matter of writing some code that would spin the motors in an aesthetically pleasing way.
Unfortunately, the customer then altered the deal. Now they wanted a stand that could stop on each license plate and linger for a bit before moving to the next one. Unfortunately, that meant the ESCs weren’t up to the task. They got dumped in favor of an ODrive motor controller, and encoders were added to the shafts so the ESP32 could keep track of the display’s position. [Proto G] says he still had to work out some kinks, such as how to keep the two motors synchronized and reduce backlash when the spinner stopped on a particular plate, but in the end we think the results look fantastic. Now if only we had some license plates we needed rotisseried…
If [Proto G] knew he needed precise positioning control from the start, he would have approached the project differently and saved himself a lot of time. But such is life when you’re working on contract.
Continue reading “Spinning ESP32 Display Puts The Customer First”
Your grandmother means well. But by the time she figures out something’s a fad, it is old news. So maybe you got a fidget spinner in your stocking this year. Beats coal. Before you regift it to your niece, you could repurpose it to be a motor. Technically, [B.Aswinth Raj] made a brushless motor, although it isn’t going to fly your quadcopter anytime soon, it is still a nice demonstrator.
You can see a video below. The idea is to put magnets on the spinner and use an electromagnet to impart energy into the spinner which is on a piece of threaded rod left over from your last 3D printer build. A hall effect sensor determines when to energize the electromagnet.
A brushed motor uses a spring-loaded brush to carry current through to the motor’s coils and keep the magnetic field oriented properly. A brushless motor works differently. There are several schemes that will work, but the one [Raj] uses is the most common. He adds fixed magnets on the rotor then uses an electromagnet to provide the correct push at the right time. A practical brushless motor will likely have more than one coil, though, and the controller has to do a particular sequence to move the rotor around the rotation.
If you want to see the insides of a real motor, we looked at how to rewind them earlier. If you’d rather repurpose your spinner to something more practical, you could always make some music.
Continue reading “Fidget Spinner Becomes A Brushless Motor; Remains Useless”
We’ve been frankly mystified at the popularity of fidget spinners. After all, we can flip an ink pen around just fine. However, [MakersBox] just sold us on what he calls the geek spinner. The fact that the spinner is actually a PCB and has parts on it, would probably have been cool enough. However, the spinner also has a persistence of vision LED set up and can display 12 characters of text as it spins. Because the board is simple and uses through hole components, it would be a great project for a budding young hacker. You can see a video below.
The instructions are geared towards someone attempting their first project, too. If you know how to solder and insert a DIP IC, you might find you’ll skim them, but it is pretty straightforward. The 8 LEDs on one side operate from an ATTiny CPU, which you can program with an Arduino. The spinner has a hall effect sensor and a magnet to figure out the index position of the spin — crucial for displaying text.
Although the board attempts to balance the components, the battery side is apparently a little heavy. The suggestion is to add some weight using some hardware or solder to that side. Speaking of solder, the bearing in the center solders to the PCB. That’s going to take a lot of heat, so maybe you can finally use Dad’s soldering gun that has been gathering dust under your bench.
We liked the polar graph provided to help you set up the code for your own messages. The text implies there is a picture of one of these graphs filled out, but we think he forgot to include that picture. However, it is clear enough how to use it, and it would make it very easy to make your own text or any design that the spinner could produce.
This isn’t the first POV spinner, by the way. [MakersBox] has a nice set of acknowledgments for projects he’s seen or borrowed from, but the other one he mentions uses surface mount. Granted, surface mount isn’t a problem for most people these days, but starting out, it might be nice to stick with a through-hole design. If you want a more useful spinner, you can always make some music.
Continue reading “Finally, A Fidget Spinner We Can Love”
Fidget spinners are not only a fad, but pretty much useless. Sounds like a job for hacking to make the toys have some actual purpose. [D777k] took up the challenge and created a MIDI controller from a common spinner. You can see a video of the results, below.
The device uses a LightBlue Bean controller and Garage Band as the MIDI software. Granted, it might not be super useful, but it is better than just a plain old spinner. [D777k] calls it a “whirling dervish of sound making!
The Arduino code that drives the thing is very simple. It reads three axes of acceleration and uses that to drive the MIDI software. When the acceleration exceeds a threshold, the software creates a new note based on the sums and differences of the accelerations.
The Lightblue Bean isn’t anything new, but it is well suited for this kind of service. Certainly, making a toy into a MIDI controller isn’t an original idea, either. But it sure is fun.
Continue reading “Fidget Spinner Gets Useful As MIDI Controller”
Hackaday continues to embrace our implacable spinning overlords-of-the-heart.
[zazzazzero] posted a YouTube video showing him fidgeting one of those spinners that had been hooked up to a bass guitar pickup. It makes a rather awesome rumbling sound as the pickup registers the bearings rolling around, and when hooked up to a Digidelay effects pedal he moved it beyond the rumble to more of an industrial growl like a factory hum. He also got interesting sounds by tapping on the spinner with a screwdriver.
Then he switched up to using an iPad audio app called Shaper to modify the resulting sound far beyond what he had before, with more effects options available at the touch of a button. All of these sounds can be modulated into the analog synthesizer chain, making this spinner a for-reals musical instrument.
We’ve published more than a couple pieces on music hacking, including this ASDR envelope generator project and the Atom Smasher guitar pedal.
Continue reading “Fidget Spinner Shreds With Bass Guitar Pickup”
Fidget spinners — so hot right now!
[Ben Parnas], and co-conspirator in engineering inanity [Greg Daneault], brought to the recent Boston Stupid Hackathon in Cambridge, MA, their IoT-enabled Fidget Spinner…. spinner. A Spidget Finner. Yep, that’s correct: spin the smartphone, and the spinner follows suit. Stupid? Maybe, but for good reason.
Part satire on cloud tech, part learning experience, a curt eight hours of tinkering brought this grotesque, ESP32-based device to life. The ESP can the Arduino boot-loader, but you’ll want to use the ESP-IDF sdk, enabling broader use of the chip.
Creating an app that pulls data from the phone’s gyroscope, the duo set up the spinner-bot to access the WiFi and request packets of rotational data from the smartphone via a cloud-based server — the ‘spincloud.’ Both devices were enabled as clients to circumvent existing IoT services.
Continue reading “Is It A Stupid Project If You Learn Something From The Process?”
A huge focus of the maker revolution has been a focus on STEAM education, or rather an education in science, technology, engineering, art, and mathematics. We’ve seen innumerable kits and tools designed to introduce children to STEAM apps, ranging from electronic Lego blocks to robotics kits built around interlocking plastic bricks. These are just a passing fad, but finally, we have what looks like a winner: a STEAM education fidget spinner.
Fidget spinners have spun into our hearts like a shuriken over the last few months, and [MakerStorage]’s latest project taps into the popularity of fidget spinners to put an educational — wait for it — spin on the usual STEAM education toolkit. This is exactly what the maker revolution needs.
On board this educational fidget spinner are a few RGB LEDs and an Arduino-compatible microcontroller development board. A coin cell battery powers everything, and in an interesting advancement of fidget spinner science, [MakerStorage] seems to be using a flanged bearing with a PCB. We’re seeing the march of technology right before our eyes, people. Right now there are two versions of the educational fidget spinner, one with an Arduino Pro Micro soldered to the board, and another with an ATMega-derived custom circuit on the board along with a PCB USB connector.
Haven’t gotten enough fidget spinner news? OH BOY does Hackaday have you covered. Here’s the Internet of Fidget Spinners, a fidget spinner with an embedded WiFi microcontroller and a bunch of blinky LEDs. Those LEDs form a Persistence of Vision display. It’s amazing, astonishing, and it’s in fidget spinner format. Bored with your oscilloscope? Turn it into a fidget spinner tachometer. There’s literally nothing that can’t be applied to the world of fidget spinners.