Power-Up circuit for HB-25

As I understand from HB-25 spec, I should power up the HB-25 after MCU. I plan to use a 12V power relay circuit to provide power for HB-25. I wonder if this is the right way to do it? Please give me some advice. Do you have a sample circuit in this case?

Thank you.
Thang Nguyen


  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    Depending on which version of the HB-25 you have (listed in the documentation), you can power on the HB-25 with the MCU but you must initialize the HB-25 signal line properly within the specified time.
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