Found in a 1960s documentation, this circuit uses a transistor to drive a relay as well as a set of neon lamps with high voltage power supply.
We found this oscillator in a publication for radio amateurs from the 70s. The circuit generates...
We found this circuit in a 1982 publication, but all the components used are still common in our...
We found this circuit in a 1976 technical documentation, but it can be assembled with modern...