2 ms·
Garmin's strategy makes sense: a heart beat strap benefits from your body's temperature regulation, both to keep cool and keep warm; a bike computer has to take
by wongarsu 3y ago
Garmin's strategy makes sense: a heart beat strap benefits from your body's temperature regulation, both to keep cool and keep warm; a bike computer has to take what it gets, but at least gets a lot of convection to keep temps reasonable when it sits in the sun.
I'm most surprised that a MacBook Pro with its active cooling doesn't have a higher max temp than a smartphone.
- mrguyorama 3y agoActive cooling effectiveness depends significantly on the delta between incoming temperature and the heat source temperature, and the relationship is worse than linear I think.
- SAI_Peregrinus 3y agoNewton's Law of Cooling shows it's an exponential decay in heat transfer rate as the delta decreases.[1] [1] https://en.wikipedia.org/wiki/Newton%27s_law_of_cooling https://en.wikipedia.org/wiki/Newton%27s_law_of_cooling
- mrguyorama 3y agoThat was my intuition but it's not my field and I'm too lazy to look it up so I really didn't want to spread more precise but less accurate info.
- chrisfosterelli 3y agoMy concern about Garmin's strap was mostly that I do a lot of running below 0 in the winter but to their credit their support was very helpful and said it was unlikely to actually damage the HRM device given the conditions I described -- they even offered to send me some free batteries since I might go through them quicker.
- NoZebra120vClip 3y agoIn 2019, Chris Siebenmann discovered that the bitter Canadian winters were taking a toll on his desktop machine at home: https://utcc.utoronto.ca/~cks/space/blog/tech/ColdLockupMachineMystery https://utcc.utoronto.ca/~cks/space/blog/tech/ColdLockupMach...