We obtained this circuit in a technical documentation from the 90's. The circuit has its sensitivity adjustment in the potentiometer. The supply voltage can be reduced with a 1k resistor change.
This common configuration source was obtained from old documentation, so the components can be...
This third-order filter was found in a 1975 publication. The circuit must be powered by a...
This circuit is basically the same configuration as the previous one with a power stage with...