When approached by a circuit that operates with RF signals, this circuit captures them by activating the indicator instrument. The circuit operates over a wide frequency range.
This circuit was published in an English magazine from 1980. The magazine no longer exists, but...
Found in a 1990s Motorola documentation, this high voltage circuit uses a PUT that is not a common...
This proximity sensor was found in a 90s Popular Electronics. The base is a PLL567 that operates...