This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the output power depends on the supply voltage. The power supply must be 30 V symmetrical.
This circuit was obtained from a 1978 Practical Wireless. It causes an LED to flash at a frequency that...
This circuit is from a 1968 Electronics World. It acts directly on a high voltage alternating...
This sensitive circuit with common transistors was found in the Radio Electronics magazine of July...