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 PLL circuit includes a small amplification stage. We found it in the December 1989 Radio...
This circuit was found in the November 1992 Radio Electronics magazine. The resistor in series with...
The circuit shown in the figure consists of an amplifier for stereo sources with Maxim's MAX9723...