Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent semiconductors. With the indicated components the load can be a lamp up to 1 A.
This circuit was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...
This circuit is from a 1965 Electronic Design. The transistors may be general purpose and the...
Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be...