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Old 28th Feb 2019, 11:13 pm   #20
Robsradio
Heptode
 
Join Date: Nov 2010
Location: Isle of Wight, UK.
Posts: 566
Default Re: Are there any Ex GPO engineers here? Dorman Lamps

Quote:
I don't remember any light sensor either in the one I reverse engineered around 1973. I can't find my circuit, but this one attached below looks pretty similar.
The ones I have seen didn't have a light sensor, they were just an NPN and PNP a C and a couple of Rs pretty much like your diagram, simplicity
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