Fault indicator (CB21396E)

This circuit was found in old American documentation. The operational amplifiers are from the period, but modern equivalents can be used.

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Astable LED (CB12038E)
This astable multivibrator configuration causes two LEDs to alternately flash at a frequency...
Simple Touch Switch (CB15424E)
In the figure we show our first circuit that consists of a simple touch switch capable of driving a...
EMG Monitor (CB13793E)
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