This circuit was found in an article in Radio Electronics magazine. The issue is from July 1992 and the circuit uses components that are common today.
This very high impedance circuit was found in documentation from the 1990s. The configuration can...
In this circuit the LED lights up when the input voltage drops below the value set in the trimpot. The...
The maximum current of this circuit is 1.5 A. The circuit has the formulas next to the diagram to...