The body-sensing light is a product designed to drive LED lighting using infrared sensing of human activities. The sensing distance requirement is 50cm, and the sensing angle is 40°. When a person or object enters the sensing range, the sensing module will output a PWM signal to drive the LED lamp to light. By a capacitive touch button, a short press can be used to switch the set LED color temperature. Long press to continuously adjust the color temperature. This program uses ultra-high cost-effective core MCU chip EFM8SB10F8G, with capacitive touch, low power consumption, the use of core distance sensor chip SI1153, can achieve no lens 50cm sensing distance, sensing angle ± 20 °.
Device advantage
· Silicon Labs 8-bit MCU EFM8SB10F8G, support capacitive touch, minimum resolution 1fF, high sensitivity, maximum range 500pF, with touch software library to simplify the development process, can meet the touch button requirements on the body sensor lamp, SB series MCU package is small, With low power consumption, MCUs with power-down monitoring have a minimum sleep current of 50nA, making them ideal for battery-powered applications, with a three-channel programmable counter array (PCA), support for PWM output modes, and output-driven LED functionality.
· Silicon Labs infrared proximity sensor SI1153, detection range without lens 0-50cm, sensing angle ± 20 °, wide detection range, can meet the requirements of the human sensor lamp detection distance; chip comes with 940nm band-pass filter, can effectively filter out It uses visible light and infrared light in other wavelengths of the environment. The pulse width of the driving infrared LED is only 25.6μs, and the drive current can be configured from 5.6mA-360mA. The average current consumption of 9μA can reduce the average power consumption of the system and meet the system battery power requirements.
Scheme diagram:
Digit Segment Led Display,Washing Machine Display,Smd Led Display,Bar Segment Led Display
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