I've experimented with powerfilm OEM for a couple of years. They need good UV protection when out in the sun, so look at the model to see if it is already protected, or you need to supply it with a secondary film.
On Tuesday, January 22, 2013 3:22:51 PM UTC-8, Eric wrote: > > pleanty of solar chargers around try these guys: > > http://www.powerfilmsolar.com/products/portable-remote > > On Tue, Jan 22, 2013 at 3:13 PM, William Pretty Security < > [email protected] <javascript:>> wrote: > >> Turns out they have a “solar” version too J >> >> >> >> https://www.sparkfun.com/products/11496 >> >> >> >> >> >> *From:* [email protected] <javascript:> [mailto: >> [email protected] <javascript:>] *On Behalf Of *William Pretty >> Security >> *Sent:* Tuesday, January 22, 2013 6:05 PM >> *To:* [email protected] <javascript:> >> *Subject:* RE: [beagleboard] LiPo power cape for Beagle Bone. >> >> >> >> Hi Guys; >> >> >> >> I was doing a little research and found this at good old Sparkfun ! >> >> >> >> https://www.sparkfun.com/products/11359 >> >> >> >> Seems to me, you mount this on a Beaglebone proto-board, add an on/off >> switch and off you go ! >> >> You can use just about any crappy old wall wort to charge the battery J >> >> >> >> Bill >> >> >> >> >> >> *From:* [email protected] <javascript:> [ >> mailto:[email protected] <javascript:>] *On Behalf Of *Eric Fort >> *Sent:* Tuesday, January 22, 2013 5:21 PM >> *To:* beagleboard >> *Cc:* Andrew Bradford >> *Subject:* Re: [beagleboard] LiPo power cape for Beagle Bone. >> >> >> >> I'm trying to better understand the issue with the creation of a LiPo >> cape for the bone. Here's my thinking: >> >> With a nominal cell voltage of 3.7v it would take a 2 cell LiPo pack to >> light up the 5v rail no matter what you do. At this point you have 7.4v. >> Use a buck converter and produce 5v from 7.4v (or possibly a 6-13.8v source >> making it a rather useful general power supply cape useful for powering the >> bone in your car as well) with decent efficiency and feed that into the 5v >> line on the expansion connectors the same way that the battery cape does >> now. As for charging the lipo pack I'm not sure I'd really worry about >> that much, rather I'd simply supply a connector on the cape for a standard >> RC type lipo pack and optionally a decent sized cap for continuity when >> changing batteries. The user could then choose the type and size needed >> for the desired runtime. when it comes to charging, just disconnect the >> LiPo pack and plug it into a standard RC charger available from any decent >> hobby store where the pack was sourced from. How does this vary from the >> approaches previously looked at for a LiPo cape? What problems might I >> have missed? >> >> Eric >> >> >> >> Eric >> >> On Tue, Jan 22, 2013 at 6:33 AM, Andrew Bradford < >> [email protected] <javascript:>> wrote: >> >> On Mon, 21 Jan 2013 20:53:16 -0800 >> Eric Fort <[email protected] <javascript:>> wrote: >> >> > Just a thought.... A large lithium pack for the bone would rock! >> >> >> Regarding the lithium battery pack idea, it's a good one except for one >> little issue with the bone where a rework is required in order to power >> down into TPS65217 OFF or SLEEP modes when a battery is connected due >> to SYS voltage staying present and the way 3.3V_EXP is generated. So >> long as you don't want to power off with the battery still connected >> there's no issue, though. >> >> The existing battery cape doesn't have this problem as it's 4 AA cells >> with a regulator and that feeds into the 5V line on the expansion >> connectors. >> >> -Andrew >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> >> >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2013.0.2890 / Virus Database: 2638/6034 - Release Date: 01/15/13 >> Internal Virus Database is out of date. >> ------------------------------ >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2013.0.2890 / Virus Database: 2638/6034 - Release Date: 01/15/13 >> Internal Virus Database is out of date. >> ------------------------------ >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2013.0.2890 / Virus Database: 2638/6034 - Release Date: 01/15/13 >> Internal Virus Database is out of date. >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2013.0.2890 / Virus Database: 2638/6034 - Release Date: 01/15/13 >> Internal Virus Database is out of date. >> >> -- >> For more options, visit http://beagleboard.org/discuss >> >> >> >> -- >> For more options, visit http://beagleboard.org/discuss >> >> >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
