This full-wave dimmer with SCRs was found in General Electric documentation from 1965. The circuit uses a unijunction and serves only for incandescent lamps.
This simple metal detector was found in a 1960 Sylvania transistor manual. The phone must be high...
This is one of the many versions of this type of indicator that the reader can find on our...
Found in an English publication from the 1980s, this circuit can be built with equivalent...