Suggested by Mullard in an old documentation, this circuit is based on a common phototransistor and on transistors that may be the modern BC548.
This power supply was originally developed for the CIR10160, but can be used with other VHV (Very...
We found this circuit in an old American documentation. The circuit can be applied to modern...
We found this circuit in a Philips documentation from 1965. The circuit uses a common LDR sensor...