>> 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


The light I'm talking about usually have a single AA or AAA battery, and
drive 2 or 3 red LEDs.  Along with the chip, there's usually a transistor
& a capacitor.

The badges etc probably use the same chip.  Similiar to the 3909, but has
on/off via a pushbutton.  COB is a bit beyond me, I'm afraid.  There
doesn't appear to be one with this functionality in 'regular person'
packaging.

If it's cheap, simple & available, why not use it?

Tony

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist