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Where have you actually come across a 555 timer in the wild?
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Gyro:
Fan speed controller in Instek bench PSUs.


P.S. I think it still gets 'typecast' as a timer, whereas a couple of voltage comparators with tweakable threshold resistor chain, a resetable flipflop and a strong push pull output stage in a single package is a gift for a cunning low cost designer.
CJay:
They're used in some of the HP Storage array cache battery charge controllers.

RobK_NL:
In the PSU of a Keithley 2001
tautech:
Nobody's mentioned kitchen toasters.  :)
Rolo:
In my Philips outdoor lamp with dusk sensor.
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