This Plant Watering Alarm Sensor uses capacitive humidity sensing to detect when soil is dry and emits small chirps as a reminder to water the plant. Special care has been taken to make it unobtrusive, with adjustable alarm levels and no noise at night. Package includes 1 sensor.
This RFID-RC522 module includes a standard S50 blank card, a special-shaped card, and two rows of pins. It works at 13.56MHz frequency, supports Mifare1 S50, mifare1 S70, mifare UltraLight, mifare Pro and mifare Desfire cards and can be connected directly to any CPU motherboard with SPI interface. Working current is 13-26mA/DC 3.3V, idle current is 10-13mA/DC 3.3V and its size is 40mm × 60mm. Ambient working temperature is -20-80 degrees Celsius.
This DS3231 IIC RTC is a high-precision clock chip with an accuracy of 2ppm and an annual error of 1 minute. It features 2 calendar alarms, programmable square wave output, rechargeable battery backup, and a temperature sensor with an accuracy of +/- 3 degree C. Its I2C bus interface offers a high transmission speed of 400KHz at 5V.
This sensor is a digital switch output device with adjustable sensitivity, capable of detecting sound intensity in its environment. It is easy to install with fixing bolt holes, and has a small board PCB size of 3.2cm x 1.7cm. It requires external 3.3V-5V voltage and GND connections.
This module can be used to charge batteries and drive LEDs with adjustable constant voltage and current. It also includes a communication protocol for computer data reading and a 0.28" digital tube display for current and voltage measurement. It has a current range of 0-5A, voltage range of 5V-30V, and accuracy of 0.1%. It measures 51mm x 26.3mm x 10mm.
This 807/807K Induction Switch is an indoor/ceiling installation with a 5.8GHz CW radio wave and ISM band. It has a 70W power (DC 12V), a 360-degree detection angle with adjustable distance of 1-10m, a light control illumination of 2-2000 LUX, and a working delay of 10 seconds to 3 minutes. It's suitable for corridors, toilets, living rooms, warehouses, garages and more. Installation reminder: There is a transmission blind spot in the center.
This 807 series indoor ceiling installation light switch runs on DC12-24V and uses 5.8GHz CW radio wave, ISM band with a transmitting power of less than 10mW. It has a detection angle of 360 degrees and can detect motion up to 1-10m away. It also has a light control illumination of 2-2000 LUX and a working delay of 10 seconds to 3 minutes. It is suitable for corridors, toilets, living rooms, warehouses, garages, etc.