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A wireless communication of LED (light emitting diode) street lamps is studied based on ZigBee protocol working with 2.4GHz. The experiment is done between two nodes of wireless LED street lamps, and the result shows that PER is blow 1% when their distance is less than 43m which satisfies the requirement of wireless network of LED street lamps.
We study an intelligent control system for LED (light emitting diode) street lamp based on temperature sensing and PWM (pulse width modulation). Experiment results show that the system can achieve energy-saving, environment-friendly and long life, and avoid human audible noise by using 25kHz as PWM modulation frequency.
We study an intelligent control system for LED (light emitting diode) street lamp based on illumination sensing and PWM (pulse width modulation). Experiment results show that the system can achieve energy-saving, environment-friendly and long life, and avoid human audible noise by using 25kHz as PWM modulation frequency.
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