Comments on: Inductive charging going mainstream

By: Adam

Adam — Thu, 19 Nov 2009 01:12:07 +0000

@supernova_hq

Why not wind the secondary for the proper voltage and forget all that other garbage.

Also, if this french fries your credit cards, they have crappy stripes, it’s not that much gauss (there is no iron core)

By: Steve

Steve — Thu, 06 Nov 2008 20:20:09 +0000

I’ve always wanted a low-power inductive system to power sci-fi models with their own lights or sound effects. I just think it would be cool to not have to hide the wires, or have concealed sockets in models for power connectors.

Does anyone have a link for efficient working schematics?

By: therian

therian — Tue, 04 Nov 2008 18:28:01 +0000

flat coil especially wide one will waist 70-80 % of energy, do do you really need such wireless charging ?

By: Nemo

Nemo — Tue, 04 Nov 2008 18:05:28 +0000

This is not inductive charging. There is an adapter that fits into the device to be charged, connecting to where the battery is, the adapter has little metal nubs that contact the pad when the device is placed on it and the power is transferred through there. This isn’t “wireless” or anything of the sort. It’s just a new and rather improved use of widely available technology.

By: fartface

fartface — Tue, 04 Nov 2008 14:51:56 +0000

that is not inductive charging.

did you guys even read the article?

By: Sparky

Sparky — Tue, 04 Nov 2008 14:17:42 +0000

@arthur92710: I think I can prove it’s inductive; any practical conductor (as opposed to theoretical, perfect conductors) has some parasitic inductance. It wouldn’t help charging the battery though.

I wonder how hard it would be to take a couple of triple-A batteries, wrap a coil around one, add a capacitor for a matched circuit, 4 diodes for rectification, and 2 resistors and a zener to prevent overcharging, and fit the whole lot in a space meant for two double-A batteries.

By: salec

salec — Tue, 04 Nov 2008 12:25:31 +0000

From the pics, it seems that primary (transmitting, pad) and secondary (receiving, mouse) inductive coils are perpendicular, which is the worst arrangement for transfer of energy. He’s lucky he’s getting any current in the secondary winding. Coil in the mouse should have its axis vertical!

Second, the primary coil is biased with too low frequency for its inductance. It is apparent from high current (wire getting too hot) in the circuit.

Third, not using full wave rectification in the mouse is another waste of energy.

By: David

David — Tue, 04 Nov 2008 06:17:00 +0000

you should check out the inductive power devices that they have here: http://www.telemetryresearch.com/

not exactly mainstream though

By: DETN8R

DETN8R — Tue, 04 Nov 2008 06:07:01 +0000

nevermind. I mistook it as a press release or something.

By: DETN8R

DETN8R — Tue, 04 Nov 2008 06:04:40 +0000

https://www.wildcharge.com/index.cfm?fuseaction=feature.display&feature_id=21

Apparently this claims that it is inductive.

By: charlie

charlie — Tue, 04 Nov 2008 05:32:39 +0000

most wireless mice are very efficient. batteries last for many months. i bet if you made the mouse translucent, and put in a quality solar cell, you could harvest enough power just from stray sunlight and lighting fixtures in the room. unfortunately wont work for the 30 yr. old virgins playing warcraft all day in their parents basement with the lights out. and thats like 40% of the market for these things.

By: Aaron

Aaron — Tue, 04 Nov 2008 04:56:35 +0000

The article this links to is inductive.

the kit at http://www.wildcharge.com/ is not.

please make the main article more clear. I’m talking about the “Update: Is the TouchCharge kit inductive? It appears to require contacts to touch the base.” part

By: -hero

-hero — Tue, 04 Nov 2008 02:28:14 +0000

lofl i remember this from that guy’s website froman rite?
yeah
theres not much on the site but it’s fun stuff

-hero

By: AttackTribble

AttackTribble — Tue, 04 Nov 2008 02:24:00 +0000

Right now I’m listening to music on my Sony wireless headphones. They charge inductively when in their stand. Works like a charm, and way easier than the previous model. The older ones used contacts that it could take several attempts to engage properly.

I like the technology, and if it were more generic it could have lots of uses. Put your cellphone, laptop, mouse, TV remote, etc. on the table, it automatically starts charging.

By: Jimmythecow

Jimmythecow — Tue, 04 Nov 2008 00:03:50 +0000

I swear, that afrotech website just needs its own hotlink on this page, seems like every time someone out there does something off the wall and crazy that has no real purpose, afroman already did it three years back lol