The LM318 is not a common component today. The circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook.
If the battery is good, the LED flashes. This simple tester uses an LM3909 integrated circuit. We found...
This circuit is from an old publication by A. Fanzeres. To use a unit, it is sometimes necessary to...
An interesting type of sensor for specific applications is the sensor formed by piezoelectric...