For anything involving video capture while moving, most videographers, cinematographers, and camera operators turn to a gimbal. In theory it is a simple machine, needing only three sets of bearings to allow the camera to maintain a constant position despite a shifting, moving platform. In practice it’s much more complicated, and gimbals can easily run into the thousands of dollars. While it’s possible to build one to reduce the extravagant cost, few use 100% off-the-shelf parts like [Matt]’s handheld gimbal.
[Matt]’s build was far more involved than bolting some brackets and bearings together, though. Most gimbals for filming are powered, so motors and electronics are required. Not only that, but the entire rig needs to be as balanced as possible to reduce stress on those motors. [Matt] used fishing weights to get everything calibrated, as well as an interesting PID setup.
Be sure to check out the video below to see the gimbal in action. After a lot of trial-and-error, it’s hard to tell the difference between this and a consumer-grade gimbal, and all without the use of a CNC machine or a 3D printer. Of course, if you have access to those kinds of tools, there’s no limit to the types of gimbals you can build.
Continue reading “Handheld Gimbal with Off-The-Shelf Parts”
We’d never seen an iconoscope before. And that’s reason enough to watch the quirky Japanese, first-person video of a retired broadcast engineer’s loving restoration. (Embedded below.)
Quick iconoscope primer. It was the first video camera tube, invented in the mid-20s, and used from the mid-30s to mid-40s. It worked by charging up a plate with an array of photo-sensitive capacitors, taking an exposure by allowing the capacitors to discharge according to the light hitting them, and then reading out the values with another electron scanning beam.
The video chronicles [Ozaki Yoshio]’s epic rebuild in what looks like the most amazingly well-equipped basement lab we’ve ever seen. As mentioned above, it’s quirky: the iconoscope tube itself is doing the narrating, and “my father” is [Ozaki-san], and “my brother” is another tube — that [Ozaki] found wrapped up in paper in a hibachi grill! But you don’t even have to speak Japanese to enjoy the frame build and calibration of what is probably the only working iconoscope camera in existence. You’re literally watching an old master at work, and it shows.
Continue reading “I am an Iconoscope”
Ever have that strange feeling that somebody is breaking into your workshop? Well, Hackaday.io user [Kenny] has whipped up a tutorial on how to scratch that itch by turning a spare Raspberry Pi you may have kicking around into a security camera system that notifies you at a moment’s notice.
The system works like this: a Raspberry Pi 3 and connected camera module remain vigilant, constantly scanning for motion and recording video. If motion is detected, it immediately snaps and sends a picture to the user’s mobile via PushBullet, then begins recording video. If there is still movement after a few seconds, the process repeats until the area is once again devoid of motion. This also permits a two-way communication with your Pi security system, so you can check in on the live feed whenever you feel the urge.
To get this working for you — assuming that your Pi has been recently updated — setup requires setting up a PushBullet account as well as installing it on your mobile and linking it with an API. For your Pi, you can go ahead with setting up some Python PushBullet libraries, installing FFmpeg, Pi Camera Notifier, and others. Or, install the ready-to-go image [Kenny] has prepared. He gets into the nitty-gritty of the code in his guide, so check that out or watch the tutorial video after the break.
Continue reading “Sneak Thieves Beware: A Pi Watcheth”
A few gadgets around the house make for excellent display and conversation pieces, but when an artifact from the wizarding world finds its way into a muggle household? Well, you frame it.
Okay so in reality this is really an animated picture frame with a Harry Potter theme — specifically the fabulous newspaper, The Daily Prophet, from the series of novels and movies. Conceived by [Piet Rullins Jr.] after a trip to ‘The Wizarding World of Harry Potter’ attraction at Orlando Studios, he wanted an inventive way to showcase the videos of his vacation.
The seven inch display is secured inside a poster frame, surrounded by a customized front page of the wizard paper — weaving the tale of his trip — and controlled by a Raspberry Pi 3. When someone approaches, an Adafruit infrared sensor detects the movement and activates the display, shutting it off after five minutes in order to preserve the screen and save power. A USB power cable hidden inside the cabinet it’s mounted on adds to the effect of a magical periodical. What, did you think it was powered by magic too?
Continue reading “Daily Prophet is a Magic Newspaper! (Kinda)”
[EvilTim] dug deep into a classic system to finally give the Game Gear a proper video output. The Game Gear was Sega’s answer to Nintendo’s Gameboy. Rushed to market, the Game Gear reused much of the hardware from the very popular Master System Console. The hardware wasn’t quite identical though – especially the cartridge slot. You couldn’t play Game Gear games on a Master System, and the game gear lacked an AV output, which meant gamers were stuck playing on a small fluorescent backlit LCD screen.
[EvilTim] wanted to play some of those retro titles on a regular TV using the original hardware. To accomplish this he had to start digging into the signals driving the Game Gear’s LCD. The Master System lineage was immediately apparent, as Game Gear’s LCD drive signals were similar in timing to those used to drive a TV. There was even a composite sync signal, which was unused on in the Game Gear.
[EvilTim] first designed a circuit using discrete ’74 series logic which would convert the LCD drive signals to SCART RGB. Of note is the construction technique used in this circuit. A tower of three 74HC374 chips allows [EvilTim] to create R, G, and B outputs without the need for a complex circuit board.
As pretty as a three-story chip tower is, [EvilTim] knew there was a better way. He re-spun the circuit with a 32 macrocell CPLD. This version also has an NTSC and PAL video encoder so those without a SCART interface can play too. If you’re not up to building your own, [EvilTim] sells these boards on his website.
We’ve seen some incredible retro gaming hacks over the years. From a NES inside a cartridge to incredible RetroPi builds. Hit the search bar and check it out!
Off the hop, we love portable consoles. To be clear, we don’t just mean handhelds like the 3DS, or RetroPie builds, but when a maker takes a home console from generations past and hacks a childhood fantasy into reality — that’s amore. So, it’s only natural that [Bill Paxton]’s GameCube re-imagined as a Game Boy Advance SP has us enthralled.
Originally inspired by an early 2000’s imagined mockup of a ‘next-gen’ Game Boy Advance, [Paxton] first tried to wedge a Wii disk drive into this build. Finding it a bit too unwieldy, he opted for running games off of SD cards using a WASP Fusion board instead. Integrating the controller buttons into the 3D printed case took several revisions. Looking at the precise modeling needed to include the L and R shoulder buttons, that is no small feat.
Sadly, this GameCube SP doesn’t have an on-board battery, so you can’t go walking about with Windwaker. It does, however, include a 15 pin mini-din VGA-style port to copy game saves to the internal memory card, a switching headphone jack, amp, and speakers. Check it out after the break!
Continue reading “Go Portable with GameCube Advance SP”
Ever wonder what those snapshots you took of your trip to Paris would look like if you ran them through a Proco RAT or a Boss Overdrive? How about a BF-3 flanger? [Robert Foss] wrote in with this nifty little script (GitHub) that processes images as if they were audio files so that you can try it out without investing in a rack of analog pedals. Test your audio/visual DSP intuition and see if you can name the images without looking at the effects.
If you know your Linux command-line utilities, there’s really not much to it — scroll down to the very bottom of the script to see how it’s done. ffmpeg converts the images to YUV format, which works much better than RGB for audio processing, and then sox adds the audio effects. Another trip through ffmpeg gets you back to an image or video.
OK, it’s cheating because it’s applying the audio effects inside the computer, but nothing’s stopping you from actually taking the audio out and running it through that dusty Small Stone. Of course, once you’ve got audio outside of the computer, the world is your oyster. Relive the glorious 70’s when video artists made works using souped-up audio synthesizers. If you haven’t seen the Sandin Image Processor or the Scanimate in action, you’ve got some YouTubing to do.