Simple Phase Shift Meter for Audio Frequency Signal

Simple phase shift measurement can be done by squaring both the measured and the reference, then compute the difference of the two signals. The accuracy of the circuit shown in the schematic diagram  below is 1% UP to 2000 cps.

This circuit is used in computers and for high speed analog instrumentation. Negative value for zero phase shift is indicated by the zero center DC ammeter, zero for 90′ phase shift and some maximum value for 180′ phase shift.

 Phase-Shift Meter for Audio Frequency Signal Circuit Diagram

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NJU7365 Single Phase DC Brushless Motor

A very simple single phase dc brushless motor driver electronic circuit project can be designed using NJU7365 DC brushless motor driver ic manufactured by New Japan radio Co. LTD .

Circuit Diagram

The NJU7365 is a single phase motor driver ic that include in package MOS FET motor driver , direct PWM input , FG output and thermal shut down circuit . The driver is capable of 1000mA maximum output current and continuous current of 350 mA . This motor driver require few external electronic parts and can be powered from dc power supply from 2 to 5.5 volts .

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