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.
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...
This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine....
The integrated circuit used in this project is not common today. It was found in a 2000...