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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.
June 2016 - It can be purchased from Mouser Electronics the new triacs Z04 for 4 A from...
The HA2620 integrated circuit used in this comparator is from the 80's, but the setting can be...
Using a Norton operational amplifier circuit, we have in the figure a variable voltage regulator. The...