In the figure we have a circuit in which two moving bar/dot indicators are connected together to increase the number of LEDs. The circuit is from a Radio Electronics from October 1980.
Found in Radio Electronics this circuit uses a fotodiac to drive a triac. The circuit can use...
This circuit was found in an Electronics Now from the 90s. The frequency depends on the crystal. The...
This power supply for gas laser was obtained in an American documentation from the 90's. The...