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Where have you actually come across a 555 timer in the wild?
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lemmegraphdat:
Product detect simulator for diagnosing and repair of ridiculously expensive date code printer. Sends a 4v pulse to the printer to fire the print head. The Pointy Hair wired the connectors wrong and blew the chips. Took them home and repaired from parts in my junk box.
dexters_lab:
spotted this today and remembered this thread   >:D

NEC C1555 variant of the 555 in this 8" floppy disk drive dated 1984.
bitslice:
NASA uses them for jet engine control

http://www.techbriefs.com/component/content/article/ntb/tech-briefs/physical-sciences/5398

actually I searched for that just as a joke, joke's on me...
Synthetase:
Used to find them in old joysticks. The stick moves a linear pot, changing the pulse freq of the 555.

I've also seen them in electric fence controllers for pulse generation.
German_EE:
The 'bonnggg' sound on Kone Elevators as the doors open and close is generated by a 555 on the control PCB.
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