or Connect
New Posts  All Forums:

Posts by Right_said_fred

pardon - i agree 4000 is high - that is real (scientific calorie) which is 4kcal, but of course in food its still referred to as calories (why in physics they stick to joules, and avoid the small calorie big CalorieI totally agree its the conversion thats the issue - I was only trying to point out that if you made an almost perfect generator, thats still a lot of energy to find from wrist / body motion.apparently a normal person uses 28kcal just to sleep for 30 mins, so...
yes 5WH would be 18KJ, agreed - if you perfectly converted 18KJ from food calories (100% efficiency) its only 5kcal, or 5 Cal.I guess if you can really convert food kcal into electrical energy with say 20% effy, then thats 25kcal, over 1% of daily effort/intake
If the watch is OLED and with processor not doing too much, basically displaying time, measuring pulse etc..., you might get the nominal continuous current consumption down to say 100mA. but lets say you wanted to keep that watch on (OLED) lit for all 16 hours, and assuming the OLED / processor runs 3V, then you still need 5 Watt-hours. If you found a perfect movement to electrical converter, that would be 4000 calories!!maybe a great health watch.... /s
 Quote:Originally Posted by GTR If you hate devices that require regular top-ups then you must HATE your car.My reply to this was it was an odd point, you claim its a valid point. Is that supposed to be contradictory?Simply - i dislike having to fill my car with gas, but I don't hate any of my cars. Thats just stupid. But who flies of a handle when having to fill up - not sure of your point here Thanks for your help in making me realize at one time we could not take our...
I think you missed a lot in what I said -But I agree - its not a problem, or a pain yet, as the product is not released. I expect apple will get several days with moderate usage. OTheriwise there will be disappointment.BTW I didn't realize I was limited in my number of replies. You don't know where I am currently, or that there is very little else I can do in my current location to take my mind of other things - pain nuisance or problem - call it whatever you want i don't...
I totally agree - Fine having to charge the watch nightly if you're playing with it a lot. But in normal moderate use it should last a couple of days, so as not be a really nuisance.I try not to confuse a nuisance with a problem. ISIS is a problem (a big one), finding out my iPhone or example is flat is more of a nuisance.
Thanks for caring.Only twice a day (unless I'm on a promise....) morning and before bed.Philips Sonicare - 2 brushings a day, 2 mins each is supposed to last 2 weeks on a single charge.I don't know if mine lasts that long, if I'm away for a few days I don't take a charger. If Im away for a week or so I do bother to take it.
What an odd point. Im fortunate to own more than one vehicle, but I don't have to top them up every night. I can go for days without having to fill up with gas. Regularity is a good thing, if you are charging, or dis-charging (esp solids and fluids). BUT having to take of a wrist watch to charge every night, and take its special charger with you every time you spend the night way from home will be a PAIN, of the sort that non-regularity in discharge might bring. 
Thats true - most days I take NO pictures, somedays quite a few - and yes - I have extra batteries always on charge. SO what I don't have to do, is habitually plug in my cameras nightly. I can easily to away for the night, and now perhaps take my RX100, and don't have to remember a charger, or even a spare battery.
My iPads get heavy use too. In fact we use iPads as document distribution for things we build and design. They are amazing for this ( good reader)   but they are plugged in enough while not being used, and simply not charged 7 nights a week, habitually like you do. The watch is strapped to my wrist - so its not going to get plugged in to something as frequently - if you can deal with charging a watch nightly - great - many people will dislike the pain.
New Posts  All Forums: