NimH AAA to 5V, suggestions?
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From: Jan Panteltje on 12 Aug 2010 06:52 On a sunny day (Thu, 12 Aug 2010 19:07:41 +1000) it happened David Eather <eather(a)tpg.com.au> wrote in <J9ydnW-V0eZDJP7RnZ2dnUVZ_sGdnZ2d(a)giganews.com>: >>> ______________|\|_________ +5 | |/| | >>> ---------------------------|-- Schottky | >>> | | | 5.6_______ || ( | 5t | >>> | | [ ] | 2t )|| (___| | >>> | | |--- ---- || ( 2t __ __ | >>> | | | | || | | | | | | >>> 1.2 V - === | | | --- ----- === >>> AA --- --- | | c NPN Si --- >>> NiMH | |22u | ------ b |150u >>> | | | e BC547 | >>> | | === | | >>> | | --- | | | | |1u | | >>> ------------------------------------------------------- WOW! >> I set off on a similar quest to power a PIC project in a "remote" >> location. >> While rummaging through the discount junk toys at Grocery Outlet, >> I stumbled across a $5 ipod charger. It's a double size usb stick >> with a 750mah lithium battery that charges from usb and puts out 5V >> regulated up to 750ma. Got a battery level button/light. >> Now, I don't have to build a charger or a regulator or, the most >> difficult part, >> a box to put it in...no nothing. >> Plug and play. >> Certainly not worth the original list price, but if you can find >> one on closeout, they're easier than most anything you can do. >> Doesn't have a switch, but if you don't load it, it stays charged for >> weeks. > >Something like this > >http://www.dealextreme.com/details.dx/sku.17836 Thats is nice :-) Cannot beat that price. >or this > >http://www.dealextreme.com/details.dx/sku.40211 > >or > >http://www.dealextreme.com/details.dx/sku.30011 Not much sun here I am afraid, I once bought such a solar charger, useless, I still use the battery box. That was NiCad days, and the self discharge was more than the sun could deliver here.
From: Grant on 12 Aug 2010 17:34 On Thu, 12 Aug 2010 10:52:38 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >On a sunny day (Thu, 12 Aug 2010 19:07:41 +1000) it happened David Eather ><eather(a)tpg.com.au> wrote in <J9ydnW-V0eZDJP7RnZ2dnUVZ_sGdnZ2d(a)giganews.com>: > >>>> ______________|\|_________ +5 | |/| | >>>> ---------------------------|-- Schottky | >>>> | | | 5.6_______ || ( | 5t | >>>> | | [ ] | 2t )|| (___| | >>>> | | |--- ---- || ( 2t __ __ | >>>> | | | | || | | | | | | >>>> 1.2 V - === | | | --- ----- === >>>> AA --- --- | | c NPN Si --- >>>> NiMH | |22u | ------ b |150u >>>> | | | e BC547 | >>>> | | === | | >>>> | | --- | | | | |1u | | >>>> ------------------------------------------------------- > >WOW! > > > >>> I set off on a similar quest to power a PIC project in a "remote" >>> location. >>> While rummaging through the discount junk toys at Grocery Outlet, >>> I stumbled across a $5 ipod charger. It's a double size usb stick >>> with a 750mah lithium battery that charges from usb and puts out 5V >>> regulated up to 750ma. Got a battery level button/light. >>> Now, I don't have to build a charger or a regulator or, the most >>> difficult part, >>> a box to put it in...no nothing. >>> Plug and play. >>> Certainly not worth the original list price, but if you can find >>> one on closeout, they're easier than most anything you can do. >>> Doesn't have a switch, but if you don't load it, it stays charged for >>> weeks. >> >>Something like this >> >>http://www.dealextreme.com/details.dx/sku.17836 > >Thats is nice :-) >Cannot beat that price. > > >>or this >> >>http://www.dealextreme.com/details.dx/sku.40211 >> >>or >> >>http://www.dealextreme.com/details.dx/sku.30011 > >Not much sun here I am afraid, I once bought such a solar charger, >useless, I still use the battery box. >That was NiCad days, and the self discharge was more than the sun could deliver here. > Maybe you could use a sunlamp to run the solar charger? ;^)
From: David Eather on 12 Aug 2010 18:35 On 12/08/2010 8:52 PM, Jan Panteltje wrote: > On a sunny day (Thu, 12 Aug 2010 19:07:41 +1000) it happened David Eather > <eather(a)tpg.com.au> wrote in<J9ydnW-V0eZDJP7RnZ2dnUVZ_sGdnZ2d(a)giganews.com>: > >>>> ______________|\|_________ +5 | |/| | >>>> ---------------------------|-- Schottky | >>>> | | | 5.6_______ || ( | 5t | >>>> | | [ ] | 2t )|| (___| | >>>> | | |--- ---- || ( 2t __ __ | >>>> | | | | || | | | | | | >>>> 1.2 V - === | | | --- ----- === >>>> AA --- --- | | c NPN Si --- >>>> NiMH | |22u | ------ b |150u >>>> | | | e BC547 | >>>> | | === | | >>>> | | --- | | | | |1u | | >>>> ------------------------------------------------------- > > WOW! > > > >>> I set off on a similar quest to power a PIC project in a "remote" >>> location. >>> While rummaging through the discount junk toys at Grocery Outlet, >>> I stumbled across a $5 ipod charger. It's a double size usb stick >>> with a 750mah lithium battery that charges from usb and puts out 5V >>> regulated up to 750ma. Got a battery level button/light. >>> Now, I don't have to build a charger or a regulator or, the most >>> difficult part, >>> a box to put it in...no nothing. >>> Plug and play. >>> Certainly not worth the original list price, but if you can find >>> one on closeout, they're easier than most anything you can do. >>> Doesn't have a switch, but if you don't load it, it stays charged for >>> weeks. >> >> Something like this >> >> http://www.dealextreme.com/details.dx/sku.17836 > > Thats is nice :-) > Cannot beat that price. This model works well. I have a couple. But sad to say there is another model that is too small for fat rechargeable batteries and is the wrong length - AA's need to have some magnets added to increase their length (how can anyone get !that! so far wrong) > > >> or this >> >> http://www.dealextreme.com/details.dx/sku.40211 >> >> or >> >> http://www.dealextreme.com/details.dx/sku.30011 > > Not much sun here I am afraid, I once bought such a solar charger, > useless, I still use the battery box. > That was NiCad days, and the self discharge was more than the sun could deliver here. > These are LiPo - they should have a very low self discharge - I will probably find out myself in a few weeks
From: Jan Panteltje on 13 Aug 2010 08:40
On a sunny day (Fri, 13 Aug 2010 08:35:11 +1000) it happened David Eather <eather(a)tpg.com.au> wrote in <6fSdnVB6ONm_6vnRnZ2dnUVZ_tOdnZ2d(a)giganews.com>: >>> http://www.dealextreme.com/details.dx/sku.17836 >> >> Thats is nice :-) >> Cannot beat that price. > >This model works well. I have a couple. But sad to say there is another >model that is too small for fat rechargeable batteries and is the wrong >length - AA's need to have some magnets added to increase their length >(how can anyone get !that! so far wrong) Here is my version: http://panteltje.com/panteltje/pic/sign_pic/sign_pic_plus_converter_hardware_img_2279.jpg Diagram is found here: http://panteltje.com/panteltje/pic/sign_pic/ >> >> >>> or this >>> >>> http://www.dealextreme.com/details.dx/sku.40211 >>> >>> or >>> >>> http://www.dealextreme.com/details.dx/sku.30011 >> >> Not much sun here I am afraid, I once bought such a solar charger, >> useless, I still use the battery box. >> That was NiCad days, and the self discharge was more than the sun could deliver here. >> > >These are LiPo - they should have a very low self discharge - I will >probably find out myself in a few weeks Let me know please. Would be nice if it worked. |