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This motion sensor LED ceiling light board has been designed using 4 white LEDs each of 1-3W, PIR sensor module, Atmega328 microcontroller, low ohm IRLR7843 MOSFET, and few other components. The PIR sensor detects the infra-red rays emitted by human motion within the detection area and switches on the 4 white LEDs for 10 seconds. The project helps in energy-saving applications and new green building projects. Detecting distance: 1 to 20 feet. Detecting angle: 360 degrees. Installation height 2-15 feet. 2 mounting holes are provided to mount this board. It is advisable to use this board indoors.
PIR Motion Sensor LED Ceiling Light – Arduino Compatible – [Link]
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“The project helps in energy-saving applications and new green building projects.” Really? There are four 3volt LEDs being run in parallel from a 12v supply through current limiting resistors. At the very least the LEDs could have been connected in series pairs to reduce the wasted power dissipated in the resistors. It looks like a nice board but please don’t brandish green credentials on something so inefficient.