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 interesting op-amp signal generator circuit was found in a 1977 documentation. The circuit has...
May 2017 - In stock at Mouser Electronics DGD Dgate drivers from Diodes Incorptrated ara...
This circuit can be used as a shield for touch control. The circuit can use any common FET like...