Variable gain operational amplifier (CB8068E)

This circuit is from an Electronics Now from the 90s. It applies to almost any operational amplifier. See formulas for component calculation.

| Clique na imagem para ampliar |

Common Telephone Line Simulator (CB6873E)
This simple circuit can be used to power a simple communication system using ordinary telephones....
Polarity Protector (CB10450E)
This circuit was obtained in a 1977 magazine, but it can still be easily assembled, as the...
TLVx172 Rail to Rail Output Operational Amplifiers (COM175E)
January 2017 - Texas Instruments' new TLVx172 operational amplifiers with Rail-to-Rail outputs can now be...