| General > General Technical Chat |
| Photoelectric light controls with thermionic switches |
| (1/3) > >> |
| 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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