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 fast circuit was found in an ancient American documentation. Output conversion speed is 30 ns and...
The filter shown in the figure can operate with frequencies up to several tens of megahertz thanks...
This audio amplifier has an internal DC volume control with logarithmic characteristics and a...