Three Cells Produce Regulated 3V – 3.3V with Power Down/Power Saving Mode

This linear voltage regulator circuit provides battery voltage regulation from battery source to power micro controller system. The output can be selected by choosing the right resistor value in the feedback path.  Many today’s micro controllers are featured with power down or power saving mode, and this circuit accommodates this feature by providing low power mode control on its input. […]

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Simple Continuity Tester with Classic Flip-Flop Circuit

The requirement of a continuity tester is that its current should be small enough to not destroy the tested circuit. This simple circuit inject not more than 0.6 mA current into the tested path in the tested circuit. The schematic diagram describes all the circuitry of the circuit. This circuit is used to test if  two point is electrically connected […]

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