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.
This circuit is from a 1968 Electronic Design. The components are from the era and the operating...
The resistor Re determines the current in the LED and can be changed. The circuit is from a 1978...
The frequency of this oscillator depends on T1 and C2. The transformer may be of the old audio...