pavelmachek (![[info]](http://p-stat.livejournal.com/img/userinfo.gif){kind=small} pavelmachek) wrote,@ 2008-04-02 01:15:00 |
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Daylight saving time is stupid idea
...and handling of time zones in vCalendar does not help. When you add an appointment to calendar in nokia 6230 (and similar, probably everything vCalendar based), the phone converts meetings to GMT, and stores them.
Unfortunately, with begining of daylight saving time, you move from GMT+1 to GMT+2... but your appointments stay there, and are now one hour off.
"Correct" solution would be to always enter timezone when entering appointment.
Workaround would be not to change timezone when dst begins, but lie to telephone, and set the time instead. Unfortunately, that would wreak havoc with synchronization, such as mobical.
"Reasonable" solution would be to assume appointments to be in "local" time zone, whatever that is. Just do not store that in GMT... but that's not how vCalendar works.
Is there chance of getting this mess cleared?
And before I loose them, here are some measurements from headlight I modded. Originally, it had 3 white leds, with optics making pretty narrow beam. I added 100mA, 90degrees red and green led.
On "almost empty" NiMHs (3x AAA), directly connected for white & green, current was: 18mA for white, 15mA for green and 26mA for red.
On freshly charged 900mAh NiMHs, current was 65mA for white, 54mA for green, 95mA for red. 82mA when running white+green.
I added switch selecting direct connection, 20 ohm resistor, and unknown blue resistor. With 20 ohms and fresh batteries, values are 28mA for white, 24mA for green and 50mA for red. Difference in light output is pretty minimal, and this setting is what I use when "very low" setting is not enough -- like going trot/gallop. White+green in this mode is very nice.
Unknown blue resistor and empty batteries gives about 3mA white (assuming 3mA on green?) and 6mA on red. Red is pretty unusable in this setting, you'll see objects above ground and branches trying to hit you, but not the ground itself. Green in this mode is OTOH very usable, providing nice light all around you, with visibility of few meters, and you can walk horse on this setting... not bad for 3mA (~10mW). This is actually too much light for eyes to go into highest-gain mode.
...and handling of time zones in vCalendar does not help. When you add an appointment to calendar in nokia 6230 (and similar, probably everything vCalendar based), the phone converts meetings to GMT, and stores them.
Unfortunately, with begining of daylight saving time, you move from GMT+1 to GMT+2... but your appointments stay there, and are now one hour off.
"Correct" solution would be to always enter timezone when entering appointment.
Workaround would be not to change timezone when dst begins, but lie to telephone, and set the time instead. Unfortunately, that would wreak havoc with synchronization, such as mobical.
"Reasonable" solution would be to assume appointments to be in "local" time zone, whatever that is. Just do not store that in GMT... but that's not how vCalendar works.
Is there chance of getting this mess cleared?
And before I loose them, here are some measurements from headlight I modded. Originally, it had 3 white leds, with optics making pretty narrow beam. I added 100mA, 90degrees red and green led.
On "almost empty" NiMHs (3x AAA), directly connected for white & green, current was: 18mA for white, 15mA for green and 26mA for red.
On freshly charged 900mAh NiMHs, current was 65mA for white, 54mA for green, 95mA for red. 82mA when running white+green.
I added switch selecting direct connection, 20 ohm resistor, and unknown blue resistor. With 20 ohms and fresh batteries, values are 28mA for white, 24mA for green and 50mA for red. Difference in light output is pretty minimal, and this setting is what I use when "very low" setting is not enough -- like going trot/gallop. White+green in this mode is very nice.
Unknown blue resistor and empty batteries gives about 3mA white (assuming 3mA on green?) and 6mA on red. Red is pretty unusable in this setting, you'll see objects above ground and branches trying to hit you, but not the ground itself. Green in this mode is OTOH very usable, providing nice light all around you, with visibility of few meters, and you can walk horse on this setting... not bad for 3mA (~10mW). This is actually too much light for eyes to go into highest-gain mode.
