Development and Implementation of LED Street Lights with Bright and Extinguishable Controls and Power Converters

Abstract

This study developed and implemented a driving power supply for light-emitting diode (LED) array streetlamps. The power stage was a quasi-resonant (QR)-flyback converter, its input power was the alternating-current power, and the LED array streetlamp was driven by the direct-current output power. The developed QR-flyback converter was operated in discontinuous conduction mode, and the pulse-width modulation (PWM) control chip was used to switch and conduct at the resonant valley of the drain-source voltage on the metal-oxide-semiconductor field-effect transistor (MOSFET) switch to reduce the switching loss. Moreover, the PWM control chip had a disable function, which was connected with a bright and extinguishable control circuit, and the high/low voltage level signal output by the Arduino development board can be used to control the output power of the QR-flyback converter, achieving bright and extinguishable controls for the LED array streetlamp.

Design and Implementation of Arduino-Based Intelligent Low Temperature Smoke Warning Bedside Lamp

“…The existing bedside lamp technology can not provide the user to sleep on the temperature is too low to remind the user, because many places the temperature change is particularly fast, especially when sleeping at night, sometimes because the temperature suddenly dropped to a very low, the indoor temperature is lower than the body can adapt to the comfortable temperature, at this time if people do not open the air conditioning and do not add the quilt it is easy to catch cold. In addition, when it comes to situations such as fire or carbon monoxide gas, we are easily exposed to danger, especially while sleeping [3,4,5]. This paper is based on the Arduino microcontroller, using tinkercad simulation development platform and C language development environment, to solve the problem of users getting cold and indoor smoke due to sudden large temperature drops when sleeping at night, as proposed in the background technology mentioned above.…”