This circuit that can be activated by light or heat was found in an old American documentation, but the components it uses are perfectly current. The power transistor shall be fitted with a heat sink.
Found in a 1966’s General Electric documentation, this circuit uses a triple diode from the time....
We found this circuit in the Linear Technology Applications of 1997. The circuit uses components of the...
This circuit was found in an old Hewlett Packard publication. Its purpose is to activate neon...