Found in a1967 Ferranti documentation, this circuit uses an operational amplifier from that time. The circuit uses a LDR as a sensor and has a null setting.
We found this circuit in factory documentation from the 70s. The operational amplifier is from...
This circuit is from a Radio Electronics from the 90's. The integrated circuit is from the time...
This circuit was found in an old American publication. It is valid for any operational. Formulas for...