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This is a system for controlling a PGA2311 or similar volume control with an Arduino. It is quite featureful, with pushbutton mute, multiple supported channels (relay switched), compile time balance, ...

So you want to control some mains electrical (or lower voltage) item using your phone, perhaps? This single ESP8266 plug-in controls a relay that is built in to the module. An Android app (.apk) ...

Abstract: This paper mainly completes the hardware platform and software design of the wireless car control system. Hardware platform design using modular design ideas, at the same time, using ARDUINO ...

Abstract: In this paper, a power control strategy is proposed for a low-voltage microgrid, where the mainly resistive line impedance, the unequal impedance among distributed generation (DG) units, and ...