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.
Found in Motorola documentation from the 90's, this circuit charges the capacitor with a constant...
This circuit has two high-impedance inputs. The gain is high and more inputs can be added. Use a...
We found this circuit in the Philips Databook of 1990. The circuit is indicated for low-cost...