On Aug 4, 2005, at 1:14 AM, Tony Smith wrote:

> Anyone know what chip bicycle flashers use?  They're 1.5v, blink AND 
> have
> on/off.  Must be billions of the buggers made...

I don't think I've ever seen one that ran off 1.5V; most use several
cells.  In fact, I might add "improved batteries" to the list of thing
leading to the demise of the 3909 - even the smallest, cheapest (thing
trade show giveaway) blinky things throw in extra batteries.
When you can go to a web site and buy a couple lithium batteries,
several LEDs, a COB IC to drive them, and some magnets to hold them
somewhere, all for less than $2 in ones; why would anyone use a 3909?

BillW

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