This shield circuit was obtained from Radio Electronics magazine, July 1990. The triac is load and power grid dependent.
This source for common, non-high-power car radios can be used on the bench. It was found in a...
This circuit was found in Maxim's documentation from the 80's. The integrated circuit is from that...
) We found this circuit in a 1988 documentation, but it uses components that are still common...