Friday, July 5, 2013

Walking your way to a full battery

Chris Gammell, of Chris Gammell's Analog Life and The Amp Hourtweeted about this gizmo. Not surprisingly, it set off his bullshit sniffer, and mine too. So, let's do a tiny little bit of physics and find out if their claim to a fully charged iPhone battery in 2.5 miles is legit.

First, the assumptions:
1. My mass is 75kg. I wish, but that's close enough.
2. My stride length is about 6 feet, so 3 feet per step. A little long, but probably close enough. That gives me about 4400 steps in that 2.5 mile walk.
3. I lift my foot about 10mm with each step.
4. An iPhone battery has about 1500mAh of battery life, which, for an average LiPo battery voltage of 3.7V, translates to 5.5wh, or approximately 20kj of energy required.

For a standard gravity, 10mm step height, 75kg person, and W = f x d, we get 7.35j per step. 4400 steps gives us 32kj total generated; we need to capture 20kj of that to charge the phone. That's 62.5% of the energy generated.

That strikes me as a high, but not *totally* unattainable goal.

Call this one "I'll believe it when I see it", which is better than "flim flam and snake oil".

Saturday, March 9, 2013

In Which I Create A Kerfuffle



Caveat lector--this post has nothing to do with making anything. Except the aforementioned kerfuffle.

First things first--I am absolutely aware of my privilege. I'm a cis, hetero white man, of unexceptional girth and slightly more than average height. I have no scars, no birthmarks, no differences of ability which would draw the eye. In short, I'm playing the Game of Life on the lowest possible difficulty level, and damn lucky for it.

So. A few months ago (right before Hogswatch Christmas), I decided to start painting my fingernails. I've always wanted to--or, at least, since I was at least a preteen--but I've never had the courage to do it. I'm not prone to an action such as this simply for attention or to be "different". I simply realized that, for the first time in my life, I was comfortable enough with myself and my life to scratch a long-denied itch.

My beautiful wife bought me many varieties of polish, and I've been painting my nails ever since. A couple of people at work teased me a bit, of course, but out of love, and that's been that. Since then, I've enjoyed the meditative experience of the delicate work of applying polish to my nails, the experimentation involved in figuring out how to keep my nails looking good as long as possible, the attention I get from people about my color choices. It's been an altogether positive thing in my life.

A week ago, I shot a product video for work. I gave a nice little tour of a new circuit board, pointing out the various features with, naturally, my (beautifully blue nailed) fingers. I'll own I was curious how it would be received; I was anticipating a bit of insult slinging, along the lines of "What a fag" or "That chick's got really hairy arms". What I wasn't prepared for was anger.

There is no such thing as a grown up, there are just kids who get older and have kids of their own, and no one really knows what the hell is going on. And this guy painting his nails is a perfect example. Also, it's our right to judge people too, it's a perfectly natural thing to do, based on my observation of his nails, I can see that he is very insecure and probably makes a lot of bad choices in life, IF he actually did paint his nails for personal reasons. (Aliens8MyCows) 
NO DEAL! I tried not letting it bother me, but it REALLY DOES BOTHER ME THAT HE MADE A VIDEO WITH PAINTED NAILS. Same way it bothers me when people where pants below their butt, or how Afghan women wear those cloths around there face. Its somewhat offensive... (Marco LovesNambla)
To those who want to pretend that a man wearing nail polish is no big deal, why is his urge then so great that he wear it to work in a highly visible public setting. There is no way anyone could be so clueless as to not know how socially unaccepted that is so it has to be very intentional. Like a drama queen looking for trouble.
Stuff like that is a clear indication of mental issues. Same as guys wearing a thick black strap around the wrist.
Like Sandra Bullock should have done, just say no  (Dan Frederiksen)

I'm pretty amazed by that, truthfully.

I'm not really offended by it--if I'm not expecting blowback surrounding such a thing by the age of 34, I'd be a fool indeed--but, geez, do these people really think I didn't know that I was doing something outside the norm?

Anyway, it's been an interesting taste of what it's like to be outside of my privileged class. I can always take off the nail polish. It's not who I am, and it's not central to my sense of self or well-being. Were I, for example, transgender, I'd imagine the reaction would be much the same, and I doubt I (or anyone) could be so sanguine as I am about this.

Finally, I want to thank my coworkers for their support. The outpouring of genuine love from them only reiterates to me that, for perhaps the first time in my life, I've found a group of people that I truly fit in with. I'm proud to be a part of an organization of people who will go to the mat for something as silly as my right to wear nail polish--I can only imagine what they'd do for someone who is LGBT or of a minority suffering similar slander.