Re: Bicycle Power adaptor for Freerunner
On Tue, Feb 17, 2009 at 1:08 PM, Alexander Mueller xelarel...@web.de wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? Something like http://geektechnique.org/projectlab/511 http://fablab.waag.org/content/usb-bike-charger http://www.instructables.com/id/How-to-Charge-Any-USB-Device-by-Riding-Your-Bike/ http://www.treehugger.com/files/2007/11/if_you_can_brea.php :) If you decide to go for one, let us know! r -- | risto h. kurppa | risto at kurppa dot fi | http://risto.kurppa.fi ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Alexander Mueller wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? Hi Alex, Personally I just use a solar charger with a large waterproof panel strapped over my panniers (http://www.solartechnology.co.uk/products/Solar_Chargers/Globetrotter_green.asp). I also carry a couple of spare batteries in case the weather is really bad. Cheers, Mike. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Hi there! Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? Assuming you're from Germany due to your name and mail provider ( ;) ), the computer magazine c't had an interesting workshop-article explaining how to build a voltage converter with rechargable battery to power devices via usb with the hub generator of a bike. The Article can be found here: http://www.heise.de/kiosk/archiv/ct/2007/23/190_kiosk (alas, not for free, they want 60 cents for it - alternatively, you can ask someone with a c't subscription for the article) They also had a multi-parted workshop in their TV show, a link to the archives can be found here: http://www.heise.de/newsticker/c-t-magazin-tv-Sommerprojekt-Multimedia-Fahrrad--/meldung/110428 hth, Konstantin ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? Alex Hi, from what i read probably the best way is to convert AC current to DC and use NiMH batteries for current excess. But my skills in this area are very poor. My plan is to use utilize batteries that are inside my front light which is Hella HL 2000. I didnt have time and wasnt brave enough to try it yet. Here is links for stuff i found on this topic: http://activationrecord.net/radekp/openmoko/charger/ Radek ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Alexander Mueller wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). check http://www.nabendynamo.de/ http://obico.de/ little expensive but good ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Ah, plenty of links. http://geektechnique.org/projectlab/511 This looks quite nice, but the electronics from http://www.instructables.com/id/ How-to-Charge-Any-USB-Device-by-Riding-Your-Bike/ looks nice to me http://www.treehugger.com/files/2007/11/if_you_can_brea.php http://fablab.waag.org/content/usb-bike-charger Are interesting, but I wanna use my hub generator (already existent). I am contemplating about an option to have a breaker switch so voltage goes exclusively to the charger (during daytime) or to the lights. Should be most efficient that way. Oh, and to tbe able to turn the stuff off Alex Risto H. Kurppa schrieb: On Tue, Feb 17, 2009 at 1:08 PM, Alexander Mueller xelarel...@web.de wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? Something like http://geektechnique.org/projectlab/511 http://fablab.waag.org/content/usb-bike-charger http://www.instructables.com/id/How-to-Charge-Any-USB-Device-by-Riding-Your-Bike/ http://www.treehugger.com/files/2007/11/if_you_can_brea.php :) If you decide to go for one, let us know! r ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Michael Sheldon schrieb: Alexander Mueller wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? Hi Alex, Personally I just use a solar charger with a large waterproof panel strapped over my panniers (http://www.solartechnology.co.uk/products/Solar_Chargers/Globetrotter_green.asp). I also carry a couple of spare batteries in case the weather is really bad. I though about such for quite a long time as well but voted against it. It adds too much to carry around (for my taste). Thats way I wanna use the generator, thats already there... Alex ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
Thanks a lot. Yes, I recall having seen this article. But didnt read it back then. And of course I threw out my old c't s quite some time ago. But will have a real close look at this. Alex Konstantin schrieb: Hi there! Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? Assuming you're from Germany due to your name and mail provider ( ;) ), the computer magazine c't had an interesting workshop-article explaining how to build a voltage converter with rechargable battery to power devices via usb with the hub generator of a bike. The Article can be found here: http://www.heise.de/kiosk/archiv/ct/2007/23/190_kiosk (alas, not for free, they want 60 cents for it - alternatively, you can ask someone with a c't subscription for the article) They also had a multi-parted workshop in their TV show, a link to the archives can be found here: http://www.heise.de/newsticker/c-t-magazin-tv-Sommerprojekt-Multimedia-Fahrrad--/meldung/110428 hth, Konstantin ___ 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: Bicycle Power adaptor for Freerunner
I think NiMH batteries hate to get overcharged, so you may want to have a protection or charging circuit in place. Alex Radek Polak schrieb: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? Alex Hi, from what i read probably the best way is to convert AC current to DC and use NiMH batteries for current excess. But my skills in this area are very poor. My plan is to use utilize batteries that are inside my front light which is Hella HL 2000. I didnt have time and wasnt brave enough to try it yet. Here is links for stuff i found on this topic: http://activationrecord.net/radekp/openmoko/charger/ Radek ___ 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: Bicycle Power adaptor for Freerunner
Well the SON is already on the bike... one of the reasons why I wanna use a hub generator for charging.. Alex Juergen Schinker schrieb: Alexander Mueller wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). check http://www.nabendynamo.de/ http://obico.de/ little expensive but good ___ 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: Bicycle Power adaptor for Freerunner
Alexander Mueller wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). AC to DC is easy. 4 diodes, or a bridge rectifier. And then a big capacitor to smooth out the DC thus generated. According to the hw list, you need to ensure something between 4V and 5V for the freerunner. Not above 5V, and under 4V can apparently cause trouble too except for 0V. There are voltage regulator chips that can be used for providing 5V. A zener diode can also prevent too high voltage, but the simplest way of using it will turn your generator into a brake as it simply wastes any excess electricity. Helge Hafting ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Bicycle Power adaptor for Freerunner
On Tuesday 17 February 2009, Alexander Mueller wrote: Hey all, is anybody out there who is using the FR on longer trips for navigation and/or geocaching? How did you solve the power problem? I would love to have an adapter from my hub generator for the Freerunner. Should not be too difficult. Something to convert AC to DC and then maybe some switching thing to getthe right voltage (DC/DC converter or what). Does anybody have a solution or some hints? I have run a Psion 5 and Garmin GPS from my lightspin generator. I used a bridge of schottky diodes and a capacitor to get DC, and the car PSU to feed them their nominal 6V and 3.3V. The car PSU used ordinary fixed voltage linear regulators. The Psion only starts using external power at 5.5V and this was available above ~12mph with this setup. The lightspin needs another tweak, but that's because it's rather an unusual generator. The voltage characteristics of different dynamos vary somewhat under load, but if you use schottky diodes for the bridge and a low dropout 5V regulator you will probably be ok from fairly low speeds. The schottky diodes have a lower voltage drop than normal rectifier diodes which is the reason to use them in this case. Charging a battery would be a better solution, as someone else suggested, but would be more complicated. to implement well. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
