Key chain XP-G… sort of.

I did end up making a mini XP-G keychain light.  However, due to lack of time and interest I only got as far as coupling 2 100mAh LiPo cells in series too two current limiting IC’s for a total output of 700mA. This was all mounted on a strip of vero board along with a switch and a small L shaped strip of aluminium for heatsinking/mount of the XP-G.

As you can see its not pretty, but it gets the job done. It could be half the length it is now with the use of a different switch and by moving the constant current IC’s to a new position. Run time is estimated to be around the hour mark.. but with no cell protection or monitoring I havent played with it for me than 10min max. Even then its in short bursts to keep the heat down.

If I was going to do this properly, it would need a metal shell for heat sinking, an under/over voltage protection circuitry (possibly something from a Lithium Iron battery protection IC as sold on dealextreme) and a way to charge the cells.

Unfortunately I have no way of charging the cells at this stage, so with no more time or interest, its going in the draw for now. On to the next project, building a Reprap Mendel.

About Richard

I am a Materials Engineering working in the field of Magnetic Materials in Melbourne, Australia. This blog covers my personal interest in all things CNC.
This entry was posted in Low cost lights. and tagged , , , , , , , . Bookmark the permalink.

1 Response to Key chain XP-G… sort of.

  1. toneBossy says:

    Very Good site, thank yo mister, it’s help’s me!

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