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.
This is a bridge for the measurement of low value resistances and high values too. The circuit...
This inverter bistable buffer circuit was obtained in a Hands On of the 90's. Next to the circuit we...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...