This circuit by Ferranti, in a 1967 publication, is intended for reading perforated tapes. The circuit uses transistors from the era that can be replaced by modern equivalents.
Found in a 90’s 303 Circuits, this circuit uses components that are still common and has a common...
This loop antenna was found in a 1990s documentation. The circuit includes a field strength meter. The...
This simple circuit, suggested by 1969 documentation, has already been featured in other articles...