Humans like things that look like other things. A great example are faux LED tea light candles, with a plastic “flame” and flickering orange LED to recreate the effect of their waxy brethren. [gzumwalt] wanted to take the concept a little further, however, and got down to work.
The design harvests the orange LED and flame lens from an existing LED candle, but the rest is all original. [gzumwalt] printed a full-size candle, and fitted it with inductive charging hardware and a lithium-polymer battery. A corresponding charging base is used to supply power to the candle when it’s not in use. This is all handled automatically, with neodymium magnets used to activate reed switches to turn the charger on and the LED off.
It’s a tidy build that can be easily replicated with a 3D printer and some off-the-shelf parts. It’s also less wasteful than using disposable batteries, and safer than using real candles – so if you find yourself routinely shooting candle scenes in your budget film studio, it might be worth printing up a set of these.
LED candles range from the basic to the extreme – we’ve seen builds so realistic, you can light them with a match.
We could watch cellphone teardown videos all day long. There’s something pleasing about seeing how everything is packed into such a small enclosure. From the connectors, to that insidious glue, to the minuscule screws, [Scotty Allen] has a real knack for giving us a great look at the teardown process. Take a look at his latest video which attempts to add wireless charging to an iPhone. I think there’s a lot to be said for superb lighting and a formidable camera, but part of this is framing the shots just right.
Now of course we’ve taken apart our fair share of phones and there’s always that queasy “I think I’m going to break something” feeling while doing it. It’s reassuring that [Scotty] isn’t able to do things perfectly either (although he has the benefit of walking the markets for quick replacement parts). This video is a pretty honest recounting of many things going wrong.
The iPhone 6 and 7 are not meant to have wireless charging, but [Scotty’s] working with a friend named [Yeke] who created an aftermarket kit for this. The flexible PCB needs to be folded just right, and adhesive foam added (along with a magical incantation) to make it work. That’s because the add-on is a no-solder job. Above you can see it cleverly encircles one of the mating connectors and relies on mechanical pressure to make contact with the legs of that connector. Neat!
In the second half of the video [Scotty] meets up with [Yeke] to discuss the design itself. We find it interesting that [Yeke] considers his work a DIY item. Perhaps it’s merely lost in translation, but perhaps [Yeke’s] proximity to multiple flexible PCB manufacturers makes him feel that this is more like playing around for fun than product design. Any way you look at it, the ability to design something that will fit inside that crazy-tight iPhone case is both impressive and mesmerizing. Having seen some of the inductive charging hacks over the years, this is by far the cleanest way to go about it.
We caught up with [Scotty] during last year’s Supercon. We may not be able to drop everything and move to Shenzhen, but hearing about the experience is just enough to keep us wanting to!
Continue reading “You Can Add Wireless Charging To IPhone… Kinda”
Using nothing more than an antenna, a spark plug, a flyback transformer, a diode, and a car phone charger, [Kreosan] have implemented the world’s most dangerous cell-phone charger: wirelessly charging their phone from high voltage power lines. This is a demonstration of a hack that we thought was just an urban legend, but it’s probably best to leave this as just a demo — this one is probably illegal and definitely dangerous.
The charger works by holding an old TV aerial fairly close to high voltage overhead cables, and passing the resulting tiny current through a spark plug and a flyback transformer to ground. To charge the phone, they tapped the transformer, rectified it through a diode, and fed it into a car-plug phone charger. [Kreosan] claims to harvest enough “free” electricity to charge the phone. (Where by “free”, we mean stolen from the electric grid.)
If you regularly find yourself running out of charge and like a bit of danger why not make a power bank that looks like a bomb instead. Sure we don’t advise you take it on a plane but it seems like a much safer option than using overhead power lines.
Continue reading “Wirelessly Charge Your Phone From High Voltage Power Lines”
Lights on the tree? Check. Presents under the tree? Check. Lights in the presents? Why not! If your gifts don’t look festive enough and you have a spare inductive charging system lying around the house—though, you could always build your own from scratch—you can brighten things up by installing a few LEDs in the packaging.
The Instructable takes advantage of those new-fangled LED Christmas lights, one strand of which typically draws under 1A and requires around 5V, putting it in the ballpark for popular induction systems used to charge cell phones such as the Powermat. In this particular example, the strand ran off 3 AA batteries, or 4.5V, which meant stepping down the voltage either with a power regulator or, more conveniently, a simple diode in series.
Some additional modifications to the packaging tidy up the installation, including carving out some of the cardboard to recess the receiver and securing everything with hot glue before wrapping it all in paper. You can see a quick demonstration video below.
Continue reading “More Lights For Your Presents”
For whatever reason, cell phone companies really don’t seem to care about giving you a good battery for your phone. Here’s a great hack if you happen to have a purse — turn it into an inductive charger! Manpurses count too, we’re not judging.
[Becky] from Adafruit came up with a great idea for this wearable hack. If your phone is sitting in your purse for long periods of time, why not charge it? It’s a pretty simple hack that makes use of a pair of inductive charging loops. One is hidden inside the bottom of your bag of choice, and the other mounted to a fixture at work or home. She’s using magnets to snap her purse into place on a shelf at work — this ensures the coils line up so the full rated charge can be transmitted.
Another option is to put the entire inductive charging circuit inside your purse, then use a battery pack with a special pocket for you phone — that way the phone is always charging while it’s safely put away!
Stick around after the break to see the complete how-to video.
Continue reading “Cellphone Charging Inductive Purse”
We’ve seen this hack a bunch of times, but this does a great job of internalizing all of the phone-side inductive charging components.
It uses the Palm Pixi wireless charging hardware which seems to be the most popular system out there. We’ve already seen that you can add this to any phone that uses USB for charging. But we don’t like the idea of opening the phone to solder connections to the USB header. We also don’t want a USB plug sticking out the bottom of the phone all the time.
This hack satisfies both issues, and it’s actually thanks to the manufacturer. The Samsung Galaxy S4 just happens to have two contacts available inside the removable back plate which are designed for Samsung’s own inductive charging hardware. Contact with the Palm charging hardware is made by pressing copper foil into place. Mating foil traces on the inside of the back cover patch this into the Touchstone receiver hardware which is a direct transplant from a Palm case.
This is touted as a solution that costs under $30. That beats the current price of a genuine Samsung inductive charging kit by a wide margin.
Continue reading “Galaxy S4 Inductive Charging Hack Keeps Everything Inside The Case”
There’s a building downtown built about ten years ago that has tablet-sized LCD screens next to the entrance of each large meeting room. They’re never on and we always wonder why they didn’t just use one of those things that holds a sheet of printer paper to label what’s happening in the meeting space? Now this is a similar idea but with much better execution. Instead of just displaying data the in-wall tablet mount makes your room interactive.
[Tim’s] been working on it for a couple of years. He started out trying to house an iPod Touch behind a junction box cover plate. There are some pictures of that at the top of his build album. That didn’t quite take so keep scrolling to see the path to the finished product shown above. He cut a hole in the drywall and figured out how to mount a tablet dock that includes inductive charging. It holds the tablet in place with the small ledge and a few magnets, keeping its battery charged without a need for wires. Once tested he mudded, sanded, textured, and painted for a perfect finished product.