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Search results for: 'systemfunctions,and finally use a buzzer module to achieve alarm function.The nursestation displays patient data through an OLED'

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Buzzer Module Module laptop charger betarie MODULE VOLTAGE module bluetooth hc05 oled display module Market
  1. Dot Laser Module - 5V, 5mW - Pack of 5

    Dot Laser Module - 5V, 5mW - Pack of 5

    5.0  (2) 
    $0.85 As low as $0.75
  2. PN532 13.56MHz NFC Card Reader Module Compatible with Raspberry Pi

    PN532 13.56MHz NFC Card Reader Module Compatible with Raspberry Pi

    $4.95 As low as $4.36
  3. 4-Channel Relay Module - 12V (High and Low Level Trigger)

    4-Channel Relay Module - 12V (High and Low Level Trigger)

    4.0  (1) 
    $1.95 As low as $1.73
  4. XL6009 DC/DC Step-up Boost Power Supply Module

    XL6009 DC/DC Step-up Boost Power Supply Module

    4.7  (13) 
    $0.60 As low as $0.54
  5. GY-801 10DOF IMU BMP180 ADXL345 HMC5883L L3G4200D Sensor Module

    GY-801 10DOF IMU BMP180 ADXL345 HMC5883L L3G4200D Sensor Module

    $26.50 As low as $23.48
  6. Capacitive Soil Moisture Sensor Module

    Capacitive Soil Moisture Sensor Module

    3.0  (1) 
    $0.30
  7. DHT11 Temperature Humidity Sensor Module

    DHT11 Temperature Humidity Sensor Module

    4.8  (3) 
    $0.65 As low as $0.58
  8. PN532 NFC/RFID Reader Writer Module - SPI/I2C Interface

    PN532 NFC/RFID Reader Writer Module - SPI/I2C Interface

    4.3  (3) 
    $2.95 As low as $2.64
  9. Quectel EC800G 4G IoT CAT1 Module with GPS Positioning

    Quectel EC800G 4G IoT CAT1 Module with GPS Positioning

    $27.50 As low as $23.68
  10. 1-Channel Relay Module - 5V

    1-Channel Relay Module - 5V

    4.4  (9) 
    $0.40 As low as $0.35
  11. SHT20 Temperature Humidity Sensor Module

    SHT20 Temperature Humidity Sensor Module

    3.5  (2) 
    $1.95 As low as $1.72
  12. GY-BME280 Temperature, Humidity and Atmospheric Pressure Sensor Module

    GY-BME280 Temperature, Humidity and Atmospheric Pressure Sensor Module

    5.0  (1) 
    $3.25 As low as $2.79
  13. KY-040 Rotary Encoder Module with Push Switch

    KY-040 Rotary Encoder Module with Push Switch

    4.4  (8) 
    $0.45 As low as $0.40
  14. TP4056 18650 Li-ion USB Type-C Battery Charger Module - 1A, w/ Protection - Pack of 5

    TP4056 18650 Li-ion USB Type-C Battery Charger Module - 1A, w/ Protection - Pack of 5

    4.9  (6) 
    $0.65 As low as $0.59
  15. Raspberry Pi Global Shutter Camera Module

    Raspberry Pi Global Shutter Camera Module

    $90.95 As low as $81.37
  16. L298P H-bridge Arduino Motor Driver Shield with Buzzer

    L298P H-bridge Arduino Motor Driver Shield with Buzzer

    $6.75 As low as $6.29
  17. 1602 16x2 Character LCD Display Module- Blue Backlight

    1602 16x2 Character LCD Display Module- Blue Backlight

    4.5  (3) 
    $0.90 As low as $0.80
  18. Micro SD TF Card Memory Shield Module

    Micro SD TF Card Memory Shield Module

    4.3  (2) 
    $0.40 As low as $0.35
  19. 6 in 1 CP2102 USB to TTL/RS485/RS232 Converter Module

    6 in 1 CP2102 USB to TTL/RS485/RS232 Converter Module

    $2.25 As low as $1.99
  20. FM Wireless Transmitter Module (+ Microphone)

    FM Wireless Transmitter Module (+ Microphone)

    3.0  (2) 
    $3.50 As low as $3.08
  21. HB100 Microwave Doppler Radar Sensor Module

    HB100 Microwave Doppler Radar Sensor Module

    $2.25 As low as $1.96
  22. Dot Laser Module - 3V, 5mW (Red)

    Dot Laser Module - 3V, 5mW (Red)

    $0.95 As low as $0.84
  23. ESP32-A1S ESP32S Audio WiFi Bluetooth Module

    ESP32-A1S ESP32S Audio WiFi Bluetooth Module

    $6.25 As low as $5.54
  24. MAX4466 Electret Microphone Adjustable Amplifier Module

    MAX4466 Electret Microphone Adjustable Amplifier Module

    4.4  (3) 
    $0.90 As low as $0.80
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