This circuit was found in a March 1988 Radio Electronics. The voltage scale is set at R3. 19 LEDs are used in this indicator circuit.
This circuit was found in a 1999 British magazine (ETI). It is a device that receives the signal...
This circuit is from an old Signetics documentation. It can be implemented with modern operational...
LTC7841 PolyPhase® Synchronized Boost Controllers Mouser Announces Analog Devices LTC7841...