This circuit was found in Radio Electronics from the 90s. The components used are common, and the transistors and CIs must be equipped with heat sinks.
This bar or moving point indicator (bargraph) employs the LM3914 and can excite 10 LEDs, of any...
This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The...
This circuit must be powered by a symmetrical source and has a very high input impedance. The...