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This circuit is from a 1967 RCA SCR manual. The circuit uses components from the era that can be replaced by modern equivalents. The transformer is 12 V x 1.2 A.
Found in a Popular Electronics from the 90s, this circuit can be applied to other operational...
This circuit eliminates transients that are 10% above the zener voltage. The transistor must be in...
This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a...