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  • eyak commented on Circuito io's instructable Thirsty Flamingo5 months ago
    Thirsty Flamingo

    Ooops!! You are so right! We have an error in our example, it should read: (A) instead of if(soilMoisture.read() > 400) use if(soilMoisture.read() < 600). (B) also: Serial.println("High moisture detected"); should be changed to: Serial.println("Low moisture detected"); We're sorryyy! and will fix the guide accordingly. Thanks for letting us know.

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  • eyak commented on Circuito io's instructable Thirsty Flamingo5 months ago
    Thirsty Flamingo

    The transistor amplifies the signal coming out of the Arduino, to get louder sounds from the speaker.The diode is a "fly-back" diode, meant to protect the circuit from reverse currents, but in most cases this diode will not be necessary with piezo speakers, but more important with regular (coil) speakers.

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