Described in the December 1969 Radio Electronics magazine, this circuit is intended to supply the previous circuit. The circuit is not isolated from the power grid.
This optical pass-through shield can be used in various applications, such as object sensing or...
Equivalent transistors like the BC548 can be used on this 1969 Mullard circuit. The circuit has two...
This is the traditional configuration of an OR gate using a voltage comparator, but it can also be...