Hello,
I'm desperately seeking an app, registry entry, or custom Raphael Radio that will allow me to *reduce* the maximum Tx (transmit) power of the main GSM/3G antenna.
My dream is to have a more safe device. I don't mind getting poor reception in concrete elevator shafts, when my phone would be transmitting at maximum power. Instead I would love a reduced maximum Tx power.
The same goes for Wifi. Nokia devices have been able to adjust their Wifi maximum Tx power for years. Even on the very first S60 3rd edition devices that came out in late 2000. 9 Years later, this option is still included with every S60 3rd/5th device out there. 4mW, 10mW and 100mW Are all options for the Wifi antenna.
I dream of the day this would come to out on the Raph. Both increased battery life (with respect to wifi) and increased safety / reduced radiation when it comes to the GSM/3G antenna.
Let's get this working.
There are anti-radiation stickers based on some magnetic technology that absorb the radiation and produce heat.Search in the online shops(I saw them in ebay) for these stickers.
Don't be pushing stickers buddy... You might as well be pushing daises.
The information concerning mobile phones and health are increasing every day. A recent study in Switzerland showed an increase of 240% of brain cancer on the same side that the phone was used on over a period of just 10 years.
A reduction in the amount of Wifi power through the registry or software is very possible, however the amount of SAR emitted from Wifi is negligible in comparison to that from the main GSM/3G antenna. For Wifi on the Raphael the SAR measurement is just 0.05, an average for many mobile phones.
However, the main antenna is a much more concerning 0.31 (850Mhz 3G) or 0.74(1900Mhz 3G) for data operations. For GPRS the Raphael has a very alarming value of 1.34. This is 84% of an already too high legal limit for radiation absorption into us.
How would one edit the radios to reduce the maximum permitted Tx (Transmit) power from the main GSM/3G antenna? It would be great if we could figure this one out!
Thank you for the information.Do you know more for these anti-radiation stickers ? I know that the sticks are based on some magnetic technology and transform the radiation into heat.
Okay, needless to say, operating systems like iOS and Android are improving plus the new processors heading to dual core. However, battery technology is way behind I think. What improvements are needed in this field to get a smartphone working for a week on one charge (not realistic but ideal)?
Fuel cells?
New alloys?
What would work to help our battery technology which is falling behind?
Battery technology is far behind but it has been for over 100 years. For electric cars Toyota claims to have a new battery with 2-3x the power density of current batteries. Although for general purpose I believe Lithium Phosphate is still the current state of the art technology.
Fuel Cells are neat technology but not yet that practical just like 10year miniature nuclear cells.
The biggest problems in my opinion are
1. phone size (everything is getting so thin or small in general) leaving less room for a battery
2. screen size (huge touchscreen = big power draw), and other things too that impact battery life.
3. things that run in the background keeping the phone cpu in something other than its lowest power state
4. screen brightness. Seems trivial but can make a big difference and I think all phones should have ambient light sensors are change automatically.
5. internet connectivity. It goes along with #3 in that it wakes the cpu, but also the current wireless chipsets don't seem all that energy efficient. Using any connectivity cellular, wifi, or bluetooth really eats the battery. Many report turning off wifi, bluetooth, and using 2g when possible significantly improve battery life.
Personally I have the biggest battery I could get for my phone and my laptop too. My 17" laptop runs 4.5 hrs at lowest brightness and 3 hrs at the brightest setting. Most phones aren't much different.
Sorry long rant...... does that break down your question correctly?
landoftheeskimos said:
Battery technology is far behind but it has been for over 100 years. For electric cars Toyota claims to have a new battery with 2-3x the power density of current batteries. Although for general purpose I believe Lithium Phosphate is still the current state of the art technology.
Fuel Cells are neat technology but not yet that practical just like 10year miniature nuclear cells.
The biggest problems in my opinion are
1. phone size (everything is getting so thin or small in general) leaving less room for a battery
2. screen size (huge touchscreen = big power draw), and other things too that impact battery life.
3. things that run in the background keeping the phone cpu in something other than its lowest power state
4. screen brightness. Seems trivial but can make a big difference and I think all phones should have ambient light sensors are change automatically.
5. internet connectivity. It goes along with #3 in that it wakes the cpu, but also the current wireless chipsets don't seem all that energy efficient. Using any connectivity cellular, wifi, or bluetooth really eats the battery. Many report turning off wifi, bluetooth, and using 2g when possible significantly improve battery life.
Personally I have the biggest battery I could get for my phone and my laptop too. My 17" laptop runs 4.5 hrs at lowest brightness and 3 hrs at the brightest setting. Most phones aren't much different.
Sorry long rant...... does that break down your question correctly?
Click to expand...
Click to collapse
It sure does for me thanks
nova display and amoled plus is good for battery
li-po is more efficient than li-ion
dual core is more efficient about 40% than single core (in ginger bread)
Hi I am looking for a dumb but common feature phone, the kind of which runs a week out of a tiny battery, that could just provide UMTS or even only GPRS over USB to a Raspberry Pi Zero.
I am squeezing every mA.
USB UMTS Sticks are not really optimised for low power, and I need to run solar 24/24/365.
I need to transmit just about a total of 32 KBytes a day, but a tiny part every second.
I'd appreciate every advice.
Hi all! I've been looking for some answers but without success. So here is my question, and hopefully I didn't miss the answers somewhere in the forum
I have a Honor View 10 with the latest updated (Android 10). I noticed that the device's bandwidth seems very slow (between 0.5 and 1MB/s download in 4G with full reception and between 1 and 6MB/s in WiFi, 1 meter away from the WiFi spot at home).
In the same conditions I get around 3 to 5x more bandwidth with an old iPad mini 2
Rebooting the V10 or going on plane mode for >15 seconds doesn't help. The bandwidth isn't stable, sometimes it's better sometimes a lot worse.
Question : is there any bandwidth limiter that activates on these phones when they get old?
I think I checked all the usual issues that could explain this problem. The 4G bandwidth could be bad for a ton of reasons. But what I don't understand is how any Apple product seems to have at least 10MB/s bandwidth on my WiFi, while this phone sometimes drops at 1MS/s (same conditions, less than 1 meter from the WiFi spot)
Thanks in advance for your replies
I got a Pixel 7 Pro, my first phone with a pressure sensor, which I thought I'd use in an app to compute the current altitude.
The sensor returns values around 1000, as expected at a pretty low altitude.
I logged a lot of values during several walks, and they weren't quite what I expected: What I find strange is there are periods with pretty accurate readings, where the difference between consecutive readings is around 0.01, alternating with periods where the difference between consecutive readings is around 2, which translates to some 15 meters, which is huge for readings taken less than half a second apart. So the latter readings are pretty much useless, unless processed to smooth the values, which is what I'm trying to do now.
I'm attaching a chart, with the readings from one walk, which should help illustrate the issue.
So I wonder if this is something that happens on other (Android) phones (ideally other Pixel 7's, but there aren't too many of these).
Yes. These are cheap uncalibrated sensors designed for mass production and are by no means intended by be accurate.
V0latyle said:
Yes. These are cheap uncalibrated sensors designed for mass production and are by no means intended by be accurate.
Click to expand...
Click to collapse
Thanks!
My issue isn't as much that they are not accurate, but that accuracy changes suddenly and hugely from time to time.
When translated to altitude, the accuracy is around 15 centimeters for several minutes (which I think is good enough for many applications), and then suddenly jumps to 20 meters, and after a while it's back to 15 centimeters, without at least going gradually from one state to another.
ciobi said:
Thanks!
My issue isn't as much that they are not accurate, but that accuracy changes suddenly and hugely from time to time.
When translated to altitude, the accuracy is around 15 centimeters for several minutes (which I think is good enough for many applications), and then suddenly jumps to 20 meters, and after a while it's back to 15 centimeters, without at least going gradually from one state to another.
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Click to collapse
That's pretty normal, when you consider the fact that barometric pressure drops about 1 PSI (6.9kPa) for every 2300 feet (698m) of altitude. This means that 20 meters (65 feet) of altitude would be a tiny, tiny difference, enough to be lost in the rather large drift inherent to inaccurate devices.
V0latyle said:
That's pretty normal, when you consider the fact that barometric pressure drops about 1 PSI (6.9kPa) for every 2300 feet (698m) of altitude. This means that 20 meters (65 feet) of altitude would be a tiny, tiny difference, enough to be lost in the rather large drift inherent to inaccurate devices.
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Click to collapse
Sorry, I don't think I was able to express my question well enough, so I'll try one last time:
My question isn't about accuracy, but about consistency, namely the lack of consistency.
I get it that these sensors are not that accurate, and I'm fine with 20 meters errors, as long as they are consistent.
What puzzles me that I get 1000 consistently inaccurate readings over several minutes, followed by another 1000 of accurate readings, without any change in the environment. It's the same app, continuously getting pressure notifications and storing them, and the values I get switch between these 2 states every once in a while (could be 1 minute, could be 30, I didn't find any pattern).
Real data from a run, where new values come some 10 times a second:
In the accurate state: 996.58, 996.56, 996.54, 996.51, 996.51, 996.53, 996.54, 996.53, 996.53, 996.53, 996.55 ... (variations of at most 0.03 between a value and the next)
In the inaccurate state: 994.92, 996.03, 998.74, 994.57, 997.03, 996.06, 999.36, 994.96, 995.61, 995.20, 996.15 ... (variations as large as 4.4 between a value and the next)
ciobi said:
Sorry, I don't think I was able to express my question well enough, so I'll try one last time:
My question isn't about accuracy, but about consistency, namely the lack of consistency.
I get it that these sensors are not that accurate, and I'm fine with 20 meters errors, as long as they are consistent.
What puzzles me that I get 1000 consistently inaccurate readings over several minutes, followed by another 1000 of accurate readings, without any change in the environment. It's the same app, continuously getting pressure notifications and storing them, and the values I get switch between these 2 states every once in a while (could be 1 minute, could be 30, I didn't find any pattern).
Real data from a run, where new values come some 10 times a second:
In the accurate state: 996.58, 996.56, 996.54, 996.51, 996.51, 996.53, 996.54, 996.53, 996.53, 996.53, 996.55 ... (variations of at most 0.03 between a value and the next)
In the inaccurate state: 994.92, 996.03, 998.74, 994.57, 997.03, 996.06, 999.36, 994.96, 995.61, 995.20, 996.15 ... (variations as large as 4.4 between a value and the next)
Click to expand...
Click to collapse
Again, this is normal. The sensors are neither accurate nor precise. This means that the pressure measurements may drift constantly.
Think of it as resolution as well as stability. They aren't sensitive enough to detect small changes in atmospheric pressure, and they aren't stable enough to deliver consistent readings all the time. They're cheap mass market consumer devices.
V0latyle said:
Again, this is normal. The sensors are neither accurate nor precise. This means that the pressure measurements may drift constantly.
Think of it as resolution as well as stability. They aren't sensitive enough to detect small changes in atmospheric pressure, and they aren't stable enough to deliver consistent readings all the time. They're cheap mass market consumer devices.
Click to expand...
Click to collapse
But they are quite accurate and plenty sensitive for some periods of time. As you can see in the attached chart, when I'm lucky to catch it in an accurate state, I can absolutely tell based on the sensor data when the phone is placed on a chair vs. on the table or on the floor, let alone when I move to a different floor.
I gave you the most reasonable educated answer I could come up with. If you don't accept that answer, it's up to you to find your own.
Cheers