Circuit for sleep mode (CB8430E)

This circuit was found in a 90s Electronic Design. It uses integrated circuits that are not common today.

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LM388 Bridge Amplifier (CB12030E)
This circuit from Radio Electronics magazine, March 1994 edition uses two LM388 bridged, providing a 4...
Direct shield for triac (CB5185E)
This shield circuit was found in an American publication from the 80's. The triac is of low...
400 Hz UJT and FET oscillator (CB8060E)
Found in an Electronics World of 1969, this circuit generates 400 Hz signals. The coil must have 3 H...