magnetic connectors/quick release connectors

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I'm working on a project for my bicycle. I'd like for there to be a cable going from my bicycle to my helmet. However, this scares me, having been in more than my fair share of crashes. The idea of being tied in to my bike is not a good one!

Thus I'm hoping to find a connector I can put inline with this cable that will release as soon as it's pulled hard (but that won't rattle loose due to vibrations like a friction lock connector would).

Apple uses a connector on some of its laptops for the power tether. It essentially is a couple pogo pins surrounded by some magnets. Works great as far as I know.

Anybody have any suggestions for how to do this? I'm looking for something as water proof as well since Boston isn't exactly blessed with good weather...

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Well I doubt you'll find anything commercially available, as Apple holds the patent on that little beauty. One option would be to buy an old apple laptop, or parts, off of ebay and salvage toe connectors that way, and then do something to water-proof them. The other would be to try and build your own.

Having a mac, I can tell you the cable connector is very simple, it has the 5 pogo pins surrounded by a thick metal shield. (the magnet is in the laptop). The laptop connector has the receiving pads slightly protruded so they fit inside of the shield of the cable connector, and contact the pogo pins.

one could probably make a DIY version with a metal washer and a magnet. Water proofing would be harder, but I imagine a soft silicone jacket that slightly protruded beyond the mating plane would work... this way the silicone always has positive pressure on the mating plane, keeping most water out. (it won't be perfect)

Writing code is like having sex.... make one little mistake, and you're supporting it for life.

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How about a Bluetooth link instead?

JC

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DocJC wrote:
How about a Bluetooth link instead?

JC


It'll be carrying power!

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another option is a break-away cable connection like what Microsoft used with the original X-Box controller. I'm sure a controller could be had for peanuts on ebay that could be used to harvest the cable/connectors from.

Writing code is like having sex.... make one little mistake, and you're supporting it for life.

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Just about any standard (barrel type) male/female electrical connector will have no problems "unplugging" when tugged on.. Just get a barrel power connector like those on a wallwart.

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mcgyvr wrote:
Just about any standard (barrel type) male/female electrical connector will have no problems "unplugging" when tugged on.. Just get a barrel power connector like those on a wallwart.

That only works well if you pull on them in the direction that they plug in. I need something that will break away no matter what direction you pull on it.

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glitch wrote:
another option is a break-away cable connection like what Microsoft used with the original X-Box controller. I'm sure a controller could be had for peanuts on ebay that could be used to harvest the cable/connectors from.

I'll have a look at some of my XBox controllers - I can't remember how well this worked.

Right now I'm leaning towards making my own connectors.

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if each end of the connector is on a dongle rather than being panel mounted standard barrel type connectors it will be able to always align along its axis and be able to pull out