This simple circuit found in a 1968 EEE was intended for data transmission over the telephone line. The components are from that time, some are uncommon today.
This two transistor audio amplifier stage was found in a publication of the year 1968. The...
Found in documentation from the 1980s, this circuit makes use of discrete components of the time....
The circuit presented is from a 2006 documentation. It can turn a set of lamps on or off when...