This circuit is from a 1977 Radio Shack manual. The photocell is an LDR and the operational one is a 741. Components with non-standard values can be approximated.
This is the minimum amplifier configuration with the LM380 and can provide an output of up to 2.5...
The circuit shown in the figure is suggested by Microchip (www.microchip.com), being built around...
We found this circuit in the 1994 National Semiconductor Linear Applications Handbook. The circuit...