You need an audio wattmeter to measure the power output of your audio amplifier? You need one LM3915 IC and add a few passive components and you got a simple but effective audio wattmeter. This sound ...
The current coil of wattmeter is connected in series with an ammeter and an inductive load. A voltmeter and the voltage circuit of the wattmeter are connected across a 400-Hz supply. The ammeter ...
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