RTC backup battery Lithium primary battery to back up the RTC on XU board. This battery can keep the RTC running up to 5 years without external power supply.
The HC-SR501 Infrared PIR Motion Sensor Module auto-senses light in various applications (in house, basement, outdoor, warehouse, garage, etc,) for ventilator control, alarm, etc. Infrared technology (LHI778 probe design) high sensitivity & high reliability. ultra-low-voltage. widely used especially for battery-powered products. This HC-SR501 Infrared...
This RGB color sensor module is based on the TCS34725 sensor chip made by TAOS. The module is designed by Adafruit who Called it (the best color sensor in the market). This is much confirmed by our own testing and experiments in future Electronics Egypt lab.