This circuit converts inductances on two scales into voltages. The circuit was obtained from a 1997 publication. C2 partially erased at position 1 of the switch is 10nF. The circuit measures inductances from 0.1uH to 100mH in three bands. The supply must be made with 5 V given the use of TTL technology. The voltmeter can be an ordinary multimeter on the voltage scale from 0 to 1 V.
