X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=LipoCharger%2Findex.mdwn;h=552c17ac8b3582c0f617f99871b3508b5e1d75a5;hb=3e4db088f70295b7771917a8ad4141321631bf26;hp=5910d18f25e4f8ab6165fd1fad65f32a747b43f5;hpb=600f3ac7d1d7e7d3d28078c78f5d506482c6b1f5;p=web%2Faltusmetrum diff --git a/LipoCharger/index.mdwn b/LipoCharger/index.mdwn index 5910d18..552c17a 100644 --- a/LipoCharger/index.mdwn +++ b/LipoCharger/index.mdwn @@ -1,23 +1,33 @@ # LipoCharger -This is a simple but effective charger for LiPo batteries. It has a higher -charge rate than the on-board charger on [TeleMetrum](../TeleMetrum), and -will be necessary for charging the batteries used with projects like -[TeleNano](../TeleNano) and [TeleMini](../TeleMini), which do not have -on-board charging capability. +This is a simple but effective, dual-rate, standalone charger for Lithium +Polymer batteries. It supports two different charge rates selectable with +a swtich, of approximately 100mA and 500mA. The 500mA rate is good for +batteries of 400 mAh and higher including the 900mAh cells sold with +[TeleMetrum](../TeleMetrum) starter kits, while the 100mA rate is more +appropriate for the 110mAh cells often used with [TeleMini](../TeleMini). A +standalone charger is essential for use with TeleMini since it does not +have on-board charging capability. + +Production units are available from the +[Garbee and Garbee](http://auric.gag.com) web store. ## Features ## ### User View ### -* Wall-wart power supply to our standard 2mm LiPo battery connector +* Micro USB connector for power input +* 2mm JST-style connector for battery +* dual-color LED + * red when charging + * green when charge complete + * both on, or "yellow", when battery is disconnected or bad * 1.0 x 0.4 inch board ### Developer View ### * Hardware Features - * [Microchip MCP73837](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en531507) Li-ion battery charger chip - * Strain-relief holes for soldering to wall-wart leads + * [Microchip MCP73831](http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en024903) Li-ion battery charger chip * Tools Used * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout * Licenses @@ -28,7 +38,3 @@ on-board charging capability. The design files can be found on [git.gag.com](http://git.gag.com) in the project [hw/lipocharger](http://git.gag.com/?p=hw/lipocharger;a=summary). -## Future Plans ## - -We need to build and evaluate some prototypes, and review costing, before -deciding whether this design will go into production.