http://forums.leaflabs.com/topic.php?id=695 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:09:10 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=695#post-105457 Mon, 30 Jun 2014 06:20:58 +0000 DenisErharts 105457@http://forums.leaflabs.com/ <p>This could be neat for a maple or lillypad arduino or for sensors.</p> <p>The systems here work good for 3v charging 5v would be awsome for a USB jack that charges itself and will discharge in your mp3 player when it is low.</p> <p>I have seen buck boost chips and energy harvesters...<br /> Now a TI Low Frequency Transever that can charge lipol batteries looks very interesting.<br /> I am allready building parts of it in kicad.<br /> Most of the examples show 3.3v what should be done to allow for 5v battery output for a 5v system 3.3v is most of my equipment but if it was to charge things that had a usb connector like cellphones mp3 players etc. how should that be done any sugjestions?</p> <p>TMS37157<br /> LTC3108<br /> linear design note 483<br /> LTC3109<br /> LTC3588-1<br /> LTC4070</p> <p>So what chip combination would work best<br /> what about allowing for a solar panel and pizio wind vibrated generator to be plugged in and charge a lipol so 5v could come out when someone plugs in their usb device?</p> <p>So which chip combination you have tried.. I am working on similar sort of USB power source and need a perfect chip system..Hope you will be able to help me out.. </p> http://forums.leaflabs.com/topic.php?id=695#post-3991 Tue, 22 Mar 2011 08:38:47 +0000 josheeg 3991@http://forums.leaflabs.com/ <p>I think I will use a open source minty boost circuit hooked to the batteries switching in or out the LF charger circuit it is simple and streight forward. </p> http://forums.leaflabs.com/topic.php?id=695#post-3990 Mon, 21 Mar 2011 16:02:41 +0000 josheeg 3990@http://forums.leaflabs.com/ <p>Low Frequency Noise USB Power source:</p> <p>This could be neat for a maple or lillypad arduino or for sensors. </p> <p>The systems here work good for 3v charging 5v would be awsome for a USB jack that charges itself and will discharge in your mp3 player when it is low. </p> <p>I have seen buck boost chips and energy harvesters...<br /> Now a TI Low Frequency Transever that can charge lipol batteries looks very interesting.<br /> I am allready building parts of it in kicad.<br /> Most of the examples show 3.3v what should be done to allow for 5v battery output for a 5v system 3.3v is most of my equipment but if it was to charge things that had a usb connector like cellphones mp3 players etc. how should that be done any sugjestions? </p> <p>TMS37157<br /> LTC3108<br /> linear design note 483<br /> LTC3109<br /> LTC3588-1<br /> LTC4070</p> <p>So what chip combination would work best<br /> what about allowing for a solar panel and pizio wind vibrated generator to be plugged in and charge a lipol so 5v could come out when someone plugs in their usb device? </p>