The sensor used in this circuit is uncommon today, however equivalent types can be tried. The comparator also supports modern equivalents. The circuit is from 80's documentation.
Figure shows the basic application of a data selector using the 4051 . The same configuration is...
This circuit can produce signals up to 100 kHz depending on C1 and R1 adjustment. The output has a...
This buffer with high input impedance and low output impedance was found in Motorola's Linear...