This circuit was found in a Modern Transistor Workbook from 1965. The circuit sends signals from a small record player to a medium-wave radio placed nearby.
Found in a 1967 Ferranti documentation, this circuit uses a LDR from that time as a sensor....
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
Thes astable was found in old publication of 1968. The circuit uses general purpose germanium...