This interface shield circuit is from the 1983 Intersil Databook. The components used are uncommon today. ADCs are low-cost digital converters. The power source voltage must be 5 V.
This simple operational amplifier tester was published in the November 1987 issue of Radio...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
This configuration can be made based on other operational amplifiers. For other frequencies, the...