This circuit is from the Motorola Linear Databook of 1990 and can be implemented with other operational amplifiers. The power supply must be symmetrical.
This circuit is from a Radio Electronics from October 1970. The circuit uses transistors from that...
This circuit, found in a 1985 documentation, causes two incandescent lamps to flash alternately. The...
This circuit was found in a 1987 edition of the United States' Hands-On Electronics magazine. The...