We found this circuit in a 1996 publication. Equivalent components can be tried, especially in the case of the photodiode. The circuit is powered by a 12 V source.
This small experimental transmitter with the CK722 transistors was found in Radio Electronics...
We found this circuit in the old Mullard transistor reference manual from 1960. The circuit is...
This circuit is designed to be used with the infrared transmitter two circuits before this one....