This circuit was found in an Electronics World of 1968. Its purpose in triggering a relay when the circuit receives signals from a vibration sensor. The circuit is used in emergency situations.
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
We can obtain the characteristics of an operational amplifier with FET by adding FETs common to the...
This interesting circuit for testing signal transistors with the oscilloscope was found in the...