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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In the diagram we show how to divide the frequency by multiples of 10 using several CMOS...
This circuit was found in a 1982 Maplin publication. The circuit is tuned to recognize a 400 Hz...
In the figure we have another application for the LT3518 integrated circuit from Linear Technology...