We found this circuit in a Mullard manual from 1960. The transistor is a phototransistor of the time. The gain is 3 dB.
No information was given on the inductor enrolled in the common core of this circuit two years 80. The...
This photoelectric circuit was found in a 70’s Ferranti's documentation. The circuit uses an...
Originally suggested by Popular Electronics to control Christmas lights, this circuit can...