Re: Solar backpack (Solar charger)
You might like to check this comparison of dynamo efficiency [1]. The Shimano has as much drag with the lights off as on! It's missing the BM [2] models though, which is a pity as they do a 12V 6W bottle model with a claimed efficiency of 70%, beating even the Schmidt. The LightSPIN had a similar verified efficiency so it's possible, but they're out of production now, and were quirky to get DC out of. [1] http://myra-simon.com/bike/dynotest.html [2] http://www.bumm.de/ On Saturday 23 May 2009, David Reyes Samblas Martinez wrote: in australia there is a company called www.pedalpower.com that has the full solution, I trying to reach them but with any luck I will try again tomorrow morning. but in parelell I trying to make my own solution, just a aux batery able to recharge while charging providing 500mA will do the trick, just precharge that battery and it will at least be mantained by the dynamo. I still searching for one that fits. For the dynamo hubs , my local bike workshop is searching for an affordable one(shimano, afiline..), but the main problem is that all dynamo hubs requires to unmount and remount the hole wheel, and this is an added cost in the total amount. so he is also searching for wheels with the dynamo hub already mounted. once I got information I will post. 2009/5/23 Michal Brzozowski ruso...@poczta.fm: Ok, I wasn't specific enough. What I'm looking for is exactly that thing in the middle :-) that will output the 500mA or 1A through a USB. Is a bike dynamo powerful enough to provide the 500mA or 1A to charge the Freerunner? 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com look at http://www.sheldonbrown.com/harris/lighting/shimano.html but remember you will have to have a good voltage regulator or better a battery charger able to charge itself and the neo at time, in the middle, to avoid the current variance of the dinamo 2009/5/23 Michal Brzozowski ruso...@poczta.fm: 2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
look at http://www.sheldonbrown.com/harris/lighting/shimano.html but remember you will have to have a good voltage regulator or better a battery charger able to charge itself and the neo at time, in the middle, to avoid the current variance of the dinamo 2009/5/23 Michal Brzozowski ruso...@poczta.fm: 2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
Ok, I wasn't specific enough. What I'm looking for is exactly that thing in the middle :-) that will output the 500mA or 1A through a USB. Is a bike dynamo powerful enough to provide the 500mA or 1A to charge the Freerunner? 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com look at http://www.sheldonbrown.com/harris/lighting/shimano.html but remember you will have to have a good voltage regulator or better a battery charger able to charge itself and the neo at time, in the middle, to avoid the current variance of the dinamo 2009/5/23 Michal Brzozowski ruso...@poczta.fm: 2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
On Sat, May 23, 2009 at 2:16 PM, Michal Brzozowski ruso...@poczta.fm wrote: Ok, I wasn't specific enough. What I'm looking for is exactly that thing in the middle :-) that will output the 500mA or 1A through a USB. Is a bike dynamo powerful enough to provide the 500mA or 1A to charge the Freerunner? 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com A normal bike dynamo has 6V and 3W so that would be 2A of current. I think that should be plenty even with the losses through conversion to 5V DC. (Depends of course how fast you are going with your bike ;)) jake ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
A normal bike dynamo has 6V and 3W so that would be 2A of current. I think that should be plenty even with the losses through conversion to 5V DC. (Depends of course how fast you are going with your bike ;)) jake oh my i'm totaly telling crap her :D it must be 0.5 A. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
in australia there is a company called www.pedalpower.com that has the full solution, I trying to reach them but with any luck I will try again tomorrow morning. but in parelell I trying to make my own solution, just a aux batery able to recharge while charging providing 500mA will do the trick, just precharge that battery and it will at least be mantained by the dynamo. I still searching for one that fits. For the dynamo hubs , my local bike workshop is searching for an affordable one(shimano, afiline..), but the main problem is that all dynamo hubs requires to unmount and remount the hole wheel, and this is an added cost in the total amount. so he is also searching for wheels with the dynamo hub already mounted. once I got information I will post. 2009/5/23 Michal Brzozowski ruso...@poczta.fm: Ok, I wasn't specific enough. What I'm looking for is exactly that thing in the middle :-) that will output the 500mA or 1A through a USB. Is a bike dynamo powerful enough to provide the 500mA or 1A to charge the Freerunner? 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com look at http://www.sheldonbrown.com/harris/lighting/shimano.html but remember you will have to have a good voltage regulator or better a battery charger able to charge itself and the neo at time, in the middle, to avoid the current variance of the dinamo 2009/5/23 Michal Brzozowski ruso...@poczta.fm: 2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
I'm starting to think that taking 2-3 additional FR batteries for a bike trip or hike is an easier solution :-) 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com in australia there is a company called www.pedalpower.com that has the full solution, I trying to reach them but with any luck I will try again tomorrow morning. but in parelell I trying to make my own solution, just a aux batery able to recharge while charging providing 500mA will do the trick, just precharge that battery and it will at least be mantained by the dynamo. I still searching for one that fits. For the dynamo hubs , my local bike workshop is searching for an affordable one(shimano, afiline..), but the main problem is that all dynamo hubs requires to unmount and remount the hole wheel, and this is an added cost in the total amount. so he is also searching for wheels with the dynamo hub already mounted. once I got information I will post. 2009/5/23 Michal Brzozowski ruso...@poczta.fm: Ok, I wasn't specific enough. What I'm looking for is exactly that thing in the middle :-) that will output the 500mA or 1A through a USB. Is a bike dynamo powerful enough to provide the 500mA or 1A to charge the Freerunner? 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com look at http://www.sheldonbrown.com/harris/lighting/shimano.html but remember you will have to have a good voltage regulator or better a battery charger able to charge itself and the neo at time, in the middle, to avoid the current variance of the dinamo 2009/5/23 Michal Brzozowski ruso...@poczta.fm: 2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
yes :) easier but less cool than have all your bike wired like a ciborg XD 2009/5/23 Michal Brzozowski ruso...@poczta.fm: I'm starting to think that taking 2-3 additional FR batteries for a bike trip or hike is an easier solution :-) 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com in australia there is a company called www.pedalpower.com that has the full solution, I trying to reach them but with any luck I will try again tomorrow morning. but in parelell I trying to make my own solution, just a aux batery able to recharge while charging providing 500mA will do the trick, just precharge that battery and it will at least be mantained by the dynamo. I still searching for one that fits. For the dynamo hubs , my local bike workshop is searching for an affordable one(shimano, afiline..), but the main problem is that all dynamo hubs requires to unmount and remount the hole wheel, and this is an added cost in the total amount. so he is also searching for wheels with the dynamo hub already mounted. once I got information I will post. 2009/5/23 Michal Brzozowski ruso...@poczta.fm: Ok, I wasn't specific enough. What I'm looking for is exactly that thing in the middle :-) that will output the 500mA or 1A through a USB. Is a bike dynamo powerful enough to provide the 500mA or 1A to charge the Freerunner? 2009/5/23 David Reyes Samblas Martinez da...@tuxbrain.com look at http://www.sheldonbrown.com/harris/lighting/shimano.html but remember you will have to have a good voltage regulator or better a battery charger able to charge itself and the neo at time, in the middle, to avoid the current variance of the dinamo 2009/5/23 Michal Brzozowski ruso...@poczta.fm: 2009/5/21 Al Johnson openm...@mazikeen.demon.co.uk If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. I'm looking for a bicycle or hand driven dynamo for use with Freerunner. Do you have any links where to find such devices? ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Solar backpack (Solar charger)
Dear All, Solar backpack absorbs solar energy and turns it into electric energy storing in storage battery. It can charge different specification mobile phones through corresponding connectors. I'm really interested in this. And I think solar backpack is much more suitable for emergency situation when there is no electricity outdoors.This product is easy to operate ,safe to use ,convenient to take and fashionable. Solar backpack is an ideal product for living and traveling. It's much more convenient than solar charger, as I don't wanna hold solar charge when I'm biking or mountain climbing :) What do u think? Any idea or comment on this? http://jdhysm.cn.alibaba.com/athena/offerdetail/sale/jdhysm-1037354-160959215.html -- Daniel.Li lida_m...@163.com PALFocus (http://palfocus.oicp.net) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
search on the list, there was some info on this, and has and here http://wiki.openmoko.org/wiki/Solar_chargers you will find results on some models I have tested, very dissapointing all in all. If you find some model useful let me know 2009/5/21 Daniel.Li lida_m...@163.com: Dear All, Solar backpack absorbs solar energy and turns it into electric energy storing in storage battery. It can charge different specification mobile phones through corresponding connectors. I'm really interested in this. And I think solar backpack is much more suitable for emergency situation when there is no electricity outdoors.This product is easy to operate ,safe to use ,convenient to take and fashionable. Solar backpack is an ideal product for living and traveling. It's much more convenient than solar charger, as I don't wanna hold solar charge when I'm biking or mountain climbing :) What do u think? Any idea or comment on this? http://jdhysm.cn.alibaba.com/athena/offerdetail/sale/jdhysm-1037354-160959215.html -- Daniel.Li lida_m...@163.com PALFocus (http://palfocus.oicp.net) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable embedded solutions Openmoko, Openpandora, Arduino Hey, watch out!!! There's a linux in your pocket!!! ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
The panel is too small to generate a reasonable amount of power, even if you were by some chance to spend all your walking/cycling time in direct sunlight, with your back to the sun, leaning forward to keep the panel at right angles to the sun. You can get flexible fold-up panels that could be strapped to the outside of a backpack or paniers, but they work much better when you're stationary and they can be pointed at the sun. For a worthwhile power output they aren't cheap. If you want something effective for emergencies or extended periods away from power a mechanical device is probably more effective. For cycling a good dynamo will provide more, and more reliable, power than any bike-mounted solar panel. Other than that there are some good quality hand cranked generators available, along with a lot of bad ones. There are even a few devices that will take energy from irregular movement, a bit like a self-winding watch. On Thursday 21 May 2009, Daniel.Li wrote: Dear All, Solar backpack absorbs solar energy and turns it into electric energy storing in storage battery. It can charge different specification mobile phones through corresponding connectors. I'm really interested in this. And I think solar backpack is much more suitable for emergency situation when there is no electricity outdoors.This product is easy to operate ,safe to use ,convenient to take and fashionable. Solar backpack is an ideal product for living and traveling. It's much more convenient than solar charger, as I don't wanna hold solar charge when I'm biking or mountain climbing :) What do u think? Any idea or comment on this? http://jdhysm.cn.alibaba.com/athena/offerdetail/sale/jdhysm-1037354-1609592 15.html ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Solar backpack (Solar charger)
On Thu, 2009-05-21 at 17:48 +0200, David Reyes Samblas Martinez wrote: search on the list, there was some info on this, and has and here http://wiki.openmoko.org/wiki/Solar_chargers you will find results on some models I have tested, very dissapointing all in all. If you find some model useful let me know Yeah, I have been watching this thread just from beginning. Actually, I have contact the ShenZhen China, and provide some types. And they are NOT as good as you proposed (From spec.) I was thinking about a backpack for a while. As it's useful, when traveling. And It seems that they have solar bag charger for laptop fro advertisement. Well, laptop, I think it's much more powerful. If so, they might be power enough for FR at least. OK, I'm just search this yesterday night and contact them. I have inquiring some spec on their product. And keep thread updated, when I have info. Well, I think it's much more useful than solar charger than you tested. It's really not that convenient when I'm out (biking, mountain climbing). If I carry SC018,SC019,SC20, just waste a lot of time for charging the internal battery. Apparently, I like keep my hands on bike or keep my hands off when climbing :) 2009/5/21 Daniel.Li lida_m...@163.com: Dear All, Solar backpack absorbs solar energy and turns it into electric energy storing in storage battery. It can charge different specification mobile phones through corresponding connectors. I'm really interested in this. And I think solar backpack is much more suitable for emergency situation when there is no electricity outdoors.This product is easy to operate ,safe to use ,convenient to take and fashionable. Solar backpack is an ideal product for living and traveling. It's much more convenient than solar charger, as I don't wanna hold solar charge when I'm biking or mountain climbing :) What do u think? Any idea or comment on this? http://jdhysm.cn.alibaba.com/athena/offerdetail/sale/jdhysm-1037354-160959215.html -- Daniel.Li lida_m...@163.com PALFocus (http://palfocus.oicp.net) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community -- Daniel.Li lida_m...@163.com PALFocus (http://palfocus.oicp.net) ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
