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.
This high impedance input amplifier is suitable for the use with piezoelectric sources such as...
The circuit shown is based on National Semiconductor buffers and was found in the 1994 Linear...
This circuit was obtained in a1969 magazine. The magazine no longer exists, but the circuit can be...