Active Topics
-
Mono Hildon Desktop Plug-ins (0)
to OS2008 / Maemo 4 / Chinook - Diablo by meetpatty - 2 hrs, 37 mins ago -
Porting apps to Leste (49)
to Maemo 7 / Leste by teroyk - 3 days, 15 hrs ago -
Maemo repository (39)
to Community by teroyk - 3 days, 15 hrs ago -
Help needed to recover from botched user config preventing boot (8)
to MeeGo / Harmattan by nphuracm - 4 days, 21 hrs ago - more...
|
2010-12-15
, 23:16
|
|
Posts: 1,522 |
Thanked: 392 times |
Joined on Jul 2010
@ São Paulo, Brazil
|
#22
|
I'm pretty sure my N900 heats up it's surrounding way more than my first mobile, it was one of those with a screen not much better than a cheap digital wristwatch and multicolored replaceable faceplates; but the way the heat is made isn't much different from how incadescent lightbulbs make heat, it simply doesn't got a single miligram of room temperature superconductor wiring in it :P
__________________
NOKIA N900: IT'S OVER NINE THOUSAND
How to use HotspotShield in the N900
Google Voice from outside the US + Free international calls: LEARN HOW HERE!!!
NOKIA N900: IT'S OVER NINE THOUSAND
How to use HotspotShield in the N900
Google Voice from outside the US + Free international calls: LEARN HOW HERE!!!
|
|
2010-12-15
, 23:32
|
|
Posts: 306 |
Thanked: 566 times |
Joined on Jan 2010
@ Romania
|
#23
|
first law always respected
n900 consume electricity and make electromagnetic radiation and no mechanical work* at thermal equilibrium
EMR= radio waves, microwaves, infrared radiation, visible light
because n900 don't stay in vacuum some heat percent is lost by conduction or convection
if speakers are active this mechanical work
must take in consideration
n900 consume electricity and make electromagnetic radiation and no mechanical work* at thermal equilibrium
EMR= radio waves, microwaves, infrared radiation, visible light
because n900 don't stay in vacuum some heat percent is lost by conduction or convection
if speakers are active this mechanical work
must take in consideration
 |
|
2010-12-15
, 23:40
|
|
Posts: 752 |
Thanked: 284 times |
Joined on Sep 2010
@ Malaysia
|
#24
|
So, to quote from earlier respond...
Originally Posted by blue_led
Is that a good 'protection'. I recently bought a C6-01 and it heats up faster than our N900.
the LDC panel have aluminum sheet back and slider of n900 is also metallic with good shielding capabilities antennas are placed on back of main unit toward your hand.
|
|
2010-12-15
, 23:49
|
|
Posts: 1,522 |
Thanked: 392 times |
Joined on Jul 2010
@ São Paulo, Brazil
|
#25
|
Talking about unwanted EM radiation, do you know if anyone has ever analyzed how succeptible to TEMPEST data leaks the N900 is?
__________________
NOKIA N900: IT'S OVER NINE THOUSAND
How to use HotspotShield in the N900
Google Voice from outside the US + Free international calls: LEARN HOW HERE!!!
NOKIA N900: IT'S OVER NINE THOUSAND
How to use HotspotShield in the N900
Google Voice from outside the US + Free international calls: LEARN HOW HERE!!!
|
|
2010-12-15
, 23:51
|
|
Posts: 306 |
Thanked: 566 times |
Joined on Jan 2010
@ Romania
|
#26
|
Originally Posted by Joseph.skb
yes the metallic sheet is a good emr protection and about heat ... nobody die form phone's heat. not shure from excesive heat from a phone on fire
Is that a good 'protection'. I recently bought a C6-01 and it heats up faster than our N900.
Originally Posted by TiagoTiago
all leaks goes to sewerage, google sewerage.
Talking about unwanted EM radiation, do you know if anyone has ever analyzed how succeptible to TEMPEST data leaks the N900 is?
Last edited by blue_led; 2010-12-15 at 23:57.
|
|
2010-12-15
, 23:58
|
|
Posts: 1,341 |
Thanked: 708 times |
Joined on Feb 2010
|
#27
|
Originally Posted by blue_led
The direct heat most likely won't be a problem, but the radiation.
n900 produce more heat than old monochrome voice call only nokia phone
did 8110 play mp4 video ? no so no power needed
2400 mAh per day = 0.1A per hour times 3,7 V = 0.37 W per hour . i think your hand can heat the n900 more than that
so what is more dangerous to skin when make a call on the beach ? n900 or the sun with 500 W /square meter intensity at sea level
The radiation is not ionizing, but yet it is a new phenomena to natural being. People and animals are used to by evolution to tolerate sun light, but not having 1800 MHz radiator 1 inch away constantly. There may be surprises. Further medical studies are needed to be made until one can be sure.
|
|
2010-12-16
, 00:07
|
|
Posts: 306 |
Thanked: 566 times |
Joined on Jan 2010
@ Romania
|
#28
|
sure . on 1 million humans perfect DNA, perfect fed, extremely well isolated from any electromagnetic waves should be enough to make an accurate statistics
|
|
2010-12-16
, 15:15
|
|
Posts: 1,341 |
Thanked: 708 times |
Joined on Feb 2010
|
#29
|
Originally Posted by blue_led
Actually 0.37 W per every second, don't you think?
2400 mAh per day = 0.1A per hour times 3,7 V = 0.37 W per hour . i
2400 mAh / 24h * 3.7V = 0.37 VA = 0.37 W
Which would mean the battery is drained 100 mA in average constantly.
(Check: 100mA * 24 h * 60 * 60 / (60 * 60) = 2400 mAh)
The worst case scenario; all that energy would be radiated out in 500 - 3000 Mhz area (GSM,UMTS,BT,WLAN). The maximum output power is limited to 2W, so daily it would radiate 4h 26min @ 2W.
Continuing the worst case scenario, all that 32 kJ radiation daily would be absorbed by my tissues. Should I worry?
(The worse than the worst case scenario:
If all that energy (32 kJ - one day) would be converted to X-rays, I (90kg) would get about 355 Gy, which would kill me.)
Last edited by zimon; 2010-12-16 at 15:26.
|
|
2010-12-16
, 15:29
|
|
Posts: 275 |
Thanked: 46 times |
Joined on Feb 2010
|
#30
|
Originally Posted by blue_led
Probably they dies, but they are not going to make you know.
near an motocross circuit were i go for fun, there is a large radio antenna which radiated power is 1.5 MW http://www.panoramio.com/photo/36534581 the powerfull on south east europe
this antenna was installed in 1949 and villagers complain about not powerfull enough to drive a washing machine from tv antenna. they diy antennas for 100 W incandescent bulb and some of them never pay for light. fluorescent enlight only if tubes stuck in the ground
if they don't die from this power for shure they don't complain about phone sar
did 8110 play mp4 video ? no so no power needed
2400 mAh per day = 0.1A per hour times 3,7 V = 0.37 W per hour . i think your hand can heat the n900 more than that
so what is more dangerous to skin when make a call on the beach ? n900 or the sun with 500 W /square meter intensity at sea level
Last edited by blue_led; 2010-12-15 at 23:18.