General > General Technical Chat
Where have you actually come across a 555 timer in the wild?
PedroDaGr8:
A variety of instruments at work use them in the power supplies (old Amersham Biosciences AKTA FPLC, Gilson Fraction collectors etc.)
David_AVD:
I saw two just the other day in a Crown high power audio amplifier. At a guess I'd say the amp design is from about 10-15 years ago.
Fraser:
There is an SMT 555 driving the charging LED in my new 2013 FLIR E4 thermal camera external charger. Its sole purpose is to make ther LED flash at approx 1Hz rate when charging the battery.
I attach a picture. Its SMT code is 'ZC5'
Phaedrus:
They get used in cheap PC motherboards some times to drive the motherboard speaker. Other times they use a piezo, or on higher end boards they'll use a more advanced audio chip.
Rerouter:
Switch-mode power supply using a 556 as the actual switching controller, (556 is just 2 555's in the same package) it had to regulate 5 rails at 120W total and i still don't quite understand how they did it (way to many passives and discrete's)
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