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Charger for batteries
Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? |
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#2
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Charger for batteries
On Jun 24, 6:10*am, Simon Lewis wrote:
Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? Trust me here, I'm not an electronics whiz but I have seen solar panel backpacks advertised:- ( http://www.treehugger.com/files/2006...able_solar.php ) Would something like that help you? Lewis. ***** |
#3
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Charger for batteries
ru4linux2 writes:
On Jun 24, 6:10Â*am, Simon Lewis wrote: Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? Trust me here, I'm not an electronics whiz but I have seen solar panel backpacks advertised:- ( http://www.treehugger.com/files/2006...able_solar.php ) Would something like that help you? Lewis. ***** Not really since it requires sun and a lot of area. And its expensive. I already have a hub dynamo. |
#4
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Charger for batteries
On Jun 24, 12:10*pm, Simon Lewis wrote:
Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? I haven't set up a phone charger off a hub dynamo but it is certainly possible. The easy if expensive and heavy way would probably be to buy the BUMM Ride & Charge, add an inverter back up to mains voltage, then use the phone's own charger. Or you could extract the charger's control modules and add them on to the Ride & Charge with an appropriate regulator. Tip: a bike is one great big heatsink. For the Ride & Charge, go here http://www.bumm.de/index-e.html and then CatalogueAccessoriesRide & Charge and also get the instruction PDF http://www.bumm.de/docu/download/492rk-e.pdf Or, you could do without the Ride & Charge and simply take the current directly from the hub dynamo to some (USB spec?) regulator/phone charge controller you've cobbled up; I'd try this on a cheap phone first. Check out the electronics DIY archives on the net; they're bound to have a schematic for doing this from a car cigarette lighter socket that you can adapt. To operate both the charger and lights off the dynamo, go to M- engineering in Holland or Peter White in the States and get the circuit for running two lights off a dynamo. *** I carry a mobile phone on my bike for calling a cab if I get a flat, emergencies, etc. It is switched off, and it isn't used for chattering on. The charge lasts months, though I recharge it once a month. I therefore think that what you want to use this phone on your tour for determines whether you will need to recharge it even once, and thus whether these contortions will be necessary. If you're just making daily or weekly calls to say, "Hey, I'm still going strong, g'bye," you probably won't need to go to the bother of a dynamo recharger. Good luck. Andre Jute Visit Jute on Amps at http://www.audio-talk.co.uk/fiultra/ "wonderfully well written and reasoned information for the tube audio constructor" John Broskie TubeCAD & GlassWare "an unbelievably comprehensive web site containing vital gems of wisdom" Stuart Perry Hi-Fi News & Record Review |
#5
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Charger for batteries
On Wed, 24 Jun 2009 13:10:35 +0200, Simon Lewis wrote:
Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? Does your mobile have a charger for an automobile? If so, then you need to find a suitable way of converting the output from your hub dynamo to something like the 12-14 volt dc output from a car battery to feed it into your automobile charger. If your hub dynamo is already 12 volt then a simple rectifier is all that is needed. If your hub is the more common 6 volt variety, then a simple voltage doubler will be required. Stephen Bauman |
#6
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Charger for batteries
Stephen Bauman writes:
On Wed, 24 Jun 2009 13:10:35 +0200, Simon Lewis wrote: Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? Does your mobile have a charger for an automobile? If so, then you need to find a suitable way of converting the output from your hub dynamo to something like the 12-14 volt dc output from a car battery to feed it into your automobile charger. If your hub dynamo is already 12 volt then a simple rectifier is all that is needed. If your hub is the more common 6 volt variety, then a simple voltage doubler will be required. Stephen Bauman Yes. But where is the product I can buy? What is a simple rectifier? |
#7
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Charger for batteries
Simon Lewis wrote:
Stephen Bauman writes: On Wed, 24 Jun 2009 13:10:35 +0200, Simon Lewis wrote: Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? Does your mobile have a charger for an automobile? If so, then you need to find a suitable way of converting the output from your hub dynamo to something like the 12-14 volt dc output from a car battery to feed it into your automobile charger. If your hub dynamo is already 12 volt then a simple rectifier is all that is needed. If your hub is the more common 6 volt variety, then a simple voltage doubler will be required. Stephen Bauman Yes. But where is the product I can buy? What is a simple rectifier? I don't think there is one you can buy. It's easy enough to make one, you'd need a full-wave rectifier, capacitor & voltage regulator, all can be purchased from Radio Shack. If you're not an electrical engineer (I am, but still would probably not go DIY), you could go with a battery powered USB charger box that uses standard (AA) cells, and either buy alkaline batteries, or use rechargeables and recharge them from your dynamo. Peter White sells such a charger, but only for 6V dynamos. That's assuming you've got a USB phone. |
#8
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Charger for batteries
Stephen Bauman wrote:
Does your mobile have a charger for an automobile? If so, then you need to find a suitable way of converting the output from your hub dynamo to something like the 12-14 volt dc output from a car battery to feed it into your automobile charger. This is a bad way to do it. Most phone batteries are 3.7 volt lithium-ion batteries which can be charged from a 5V source and there are USB charging cables specifically for this purpose. Don't use a linear regulator to go from the 8.5VDC nominal voltage out of the bridge rectifier down to 5VDC because you'll be losing more than 40% of the power output of the dynamo as heat, leaving insufficient current to charge the phone. You need something like a Meanwell DCW05A-05 plus a bridge rectifier and filter caps between the dynamo and the converter. Even though the input is 9V, rather than the 8.5V you'll get out of a rectified 6VAC/3W dynamo, in reality the dynamo will put out a higher voltage at higher speeds, so it'll work except when going really slow. |
#9
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Charger for batteries
On Wed, 24 Jun 2009 17:40:42 +0200, Simon Lewis
wrote: Stephen Bauman writes: On Wed, 24 Jun 2009 13:10:35 +0200, Simon Lewis wrote: Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? Does your mobile have a charger for an automobile? If so, then you need to find a suitable way of converting the output from your hub dynamo to something like the 12-14 volt dc output from a car battery to feed it into your automobile charger. If your hub dynamo is already 12 volt then a simple rectifier is all that is needed. If your hub is the more common 6 volt variety, then a simple voltage doubler will be required. Stephen Bauman Yes. But where is the product I can buy? What is a simple rectifier? The electronic design aspect of this is pretty trivial. Designing something that is convenient and absolutely, positively guaranteed to not **** up your cell phone or charger regardless of what generator you use or how you hook it up and then have enough of a market to make manufacture worthwhile is difficult. It might be worthwhile to design for some particular dynamo with reasonably standard connectors and a large installed base of tourists. Charging notebook computers and GPS devices would be other applications. Just what hub dynamo do you have? Got specs? How does it connect? Might be worth an experiment. |
#10
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Charger for batteries
On Jun 24, 6:10*am, Simon Lewis wrote:
Ive seen mention for pedal & power and something from motorola, but I cant find anywhere to purchase such things. I want to trickle feed/charge my mobile from the hub dynamo when touring. Surely such a thing exists and works? Most links I find are dead ends or defunct companies. Anyone got anything concrete that they have used and can recommend? I mean, if I can recharge my mobile from a USB port I surely can from a hub dynamo? http://www.treehugger.com/files/2007...rolas_bike.php |
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