General > General Technical Chat
Photoelectric light controls with thermionic switches
strawberry:
this thing may not turn off in harsh winter
langwadt:
but it fails on which is the safe option, and with no electronics very rugged
N2IXK:
Thermostatic, not thermionic (unless it has a vacuum tube in it)...
AVGresponding:
Modern ones don't use CdS photocells anyway, due to RoHS. They use photodiodes now.
strawberry:
it could be much better with two transistor hysteresis comparator
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