The gain of this amplifier is given by the components indicated in the formulas next to the diagram. The power supply must be symmetrical and equivalent operational amplifiers can be used.
This configuration was found in a 1970s American magazine. The circuit uses both CMOS logic and...
Found in the August 1982 issue of Radio Electronics magazine, this circuit lights LEDs in sequence...
This flasher with a well-known configuration was suggested by a 1977 publication by Radio Shack. The...