This circuit was found in American documentation from the 1980s. The integrated circuit used is still common today, but equivalents can be used.
This circuit was obtained in a 90s Electronic Design. The circuit has a voltage gain of 2 times...
This circuit, suggested by an Electronics World of 1969, keeps a blinking LED for a while when a...
The operational amplifier for this circuit, found in a 1979 publication, may be the 741....