Very Low Frequency Clock (CB26103E)

Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz signal from a 4.1952 Hz crystal.

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LM317K Regulator (CB24817E)
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High Impedance Instrumentation Buffer MC4741 (CB15268E)
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Three-phase motor control (CB7268E)
Suggested by Sprague in the 1980s documentation, this circuit can control three-phase AC motors....