Re: Flashing



In message <19a1v45iimtem4atgn298feb0e8e2rnhmi@xxxxxxx>, Austin Shackles <austinDITCHTHISFORBETTERRESULTS@xxxxxxxxxxxx> writes
On or around Thu, 23 Apr 2009 15:44:57 +0100, Guy King
<guy.king@xxxxxxxxxxxx> enlightened us thusly:
Yeah, I started with 1.2Ah, but then meant to change it to 1200mAh but
got lost.

so you've got about 1.4V and 1.2 Ah, which is about 1.68Wh, I reckon.
Considering it has what amounts to a dc-dc converter in it (unless someone's
molished LEDs wot run at 1.4V) that will presumably be less than 100%
efficient, which means if you get more'n about 1.5 hours at full output
you'll be doing well.

At 1A or so discharge rate, I'd reckon a 1.2AH-rated AAA cell would deliver a fair bit less than 1AH, and at a terminal voltage of little more than 1.2 volts, if not less - their rated capacity is only likely to be achievable over 5 or 10 hours. I'd say about 30 or 40 minutes would be doing well with 1A drain.

I'd guess the torch will indeed probably have an inverter to 3 volts or so in it; others which hfr one or two cells, and which I've taken to bits, have had one in them.
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Andrew Marshall, G8BUR, M0MAA.
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