This circuit was taken from an article in Electronics Now magazine in February 1995. The power supply must be dual and other operational amplifier can be used.
Found in a 1980 publication, this circuit triggers a power lamp, making it blink when light hits...
This circuit was found in a 1967 EEE. The components are from that time, but the circuit can be...
The circuit shown was found in a Japan publication from the 1960s. The transistors can be of any...