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Create Automatic power switching for Temperature sensor connected with ZigBee Module

366 7
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  • Request for automatic 5 V source switching circuit

    #1 21680650
    Derby Jhon
    Anonymous  
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  • #2 21680651
    Derby Jhon
    Anonymous  
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  • Schottky diode isolation for battery and adapter switching

    #3 21680652
    Elizabeth Simon
    Anonymous  
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  • Clarifying host micro and sensor power control

    #4 21680653
    Aubrey Kagan
    Anonymous  
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  • Proposes smart power switching for XBee and I2C sensor

    #5 21680654
    Derby Jhon
    Anonymous  
  • Proposes smart power switching for XBee and I2C sensor

    #6 21680655
    Derby Jhon
    Anonymous  
  • Clarify power-switching goals and 3.3 V regulation

    #7 21680656
    Aubrey Kagan
    Anonymous  
  • Use a 3.3 V regulator for XBee and sensor

    #8 21680657
    Elizabeth Simon
    Anonymous  

Topic summary

LABEL_AI_GENERATED
The discussion focuses on designing an automatic power switching circuit for a temperature sensor transmitting data via a ZigBee Pro module. The sensor is powered by either a 5V DC battery or a 5V AC-to-DC adapter, requiring a solution that prevents damage to the hardware. The temperature sensor used is the SHT31 (I2C interface), and the ZigBee Pro module is an XBee variant operating at 3.3V. Key challenges include managing different power sources, voltage regulation from 5V to 3.3V for the XBee, and ensuring safe switching without backflow current. A recommended approach involves using Schottky diodes to isolate power sources and a voltage regulator with an enable pin to supply stable 3.3V to both devices. Powering the sensor and XBee simultaneously is typical, but individual power control is more complex. Battery voltage considerations highlight that typical alkaline batteries provide 4.5V (3x1.5V) rather than a full 5V, and rechargeable options require charging circuitry. The discussion also references example schematics for XBee integration and datasheets for both devices to guide design decisions.
AI summary based on the discussion. May contain errors.
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