This circuit was found in a 90s Radio Electronics. It produces an ultrasonic signal in a special transducer at the frequency of 2.25 MHz. No information was given about the transformers.
Found in a 1969 EDN, this high current circuit, not indicated in the documentation, uses...
September 2016 - Mouser Electronics is providing new ultraviolet LEDs VLMU1610 of Vishay suitable...
Found in Motorola's 1968 power circuit manual, this circuit has a high input voltage and no...