RTC & WatchDog HAT for Raspberry Pi, Auto Reset, DS3231SN High Precision RTC, MAX705
Make: WaveShare Electronics Co.
SKU: 2525
Availability: OUT OF STOCK

₹971.14 inc. GST
Ex GST: ₹823.00
Qty:
 


Additional Info
  • Prices shown are Including GST.
  • B2B GST Credit Available.
  • Economy shipping at flat ₹49.
  • Estimated Delivery time?
  • Free shipping on value > ₹2499.
  • Whatsapp Support @+917231066325

  • RTC WatchDog HAT

    • MAX705 monitoring circuit with auto reset function
    • Incorporates DS3231SN high precision RTC chip, with backup battery holder
    • Reset pin selection for swiching watchdog
    • Indicator for watchdog output warning

    Documentation

    Demo codes

    How to use

    RTC

    Open a terminal and run the following command to download the codes

    wget https://www.waveshare.com/w/upload/b/bd/RTC_WatchDog_HAT.zip
    zip RTC_WatchDog_HAT.zip
    sudo chmod 777 -R RTC_WatchDog_HAT
    cd RTC_WatchDog_HAT/RTC
    
    C examples
    cd ~/RTC_WatchDog_HAT/RTC/c/
    make clean
    make 
    sudo ./main
    
    RTC WatchDog HAT 1.png
    Python example
    cd ~/RTC_WatchDog_HAT/RTC/python/examples/
    sudo python main.py
    

     

    RTC WatchDog HAT 2.png

    WatchDog

    In the WatchDog example, it feeds the watchdog chip if the D4 pin toggle. If the watchdog doesn't be feed in T time, it will cut off the power and the voltage falls to 1.25V, in this case, the MAX705 chip will reset and restart the power. About the time T:

    T = 0.7*R*C+1.6s
    
    R is default 5.1M, and C is default 44uF
    Tge default delay time is 157.08s ±6%

    RC are set in the board:

    RTC-WatchDog-HAT-3.jpg

    Write a review

    Your Name:


    Your Review: Note: HTML is not translated!

    Rating: Bad           Good

    Enter the code in the box below: