This circuit was taken from old American documentation. The transistors used make it possible to control a motor with up to 2 A of current. They must be equipped with heat sinks.
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This circuit was obtained from an English documentation from 1995. The operational amplifier can...
This circuit is found in an American documentation from the 80's. The circuit measures the power of...
Found in Popular Electronics from the 90s, this circuit is based on a PLL567 and employs high-end or...