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HB-25 has PWM pin high? — Parallax Forums

HB-25 has PWM pin high?

thangnguyenthangnguyen Posts: 8
edited 2016-01-04 02:22 in Accessories
Hi,
I am not sure why when I measure between B and W pin on of my 2 HB-25s, I get about 4.75 and 4.78 volt. I believe the input port should not have any voltage. Do I miss anything here?

Regards,
Thang

Comments

  • thangnguyenthangnguyen Posts: 8
    So I understand that the PWM input is active high. If my DO is pulled down by a resistor (active low) is there anything wrong if I connect them together?
  • Duane DegnDuane Degn Posts: 10,588
    thangnguyen wrote: »
    So I understand that the PWM input is active high. If my DO is pulled down by a resistor (active low) is there anything wrong if I connect them together?

    I'm not sure what you're asking.

    What sort of microcontroller are you using?

    I normally control my HB-25 controllers the same way I control a CR servo.

    I think you need to actively drive the HB-25 signal pin. I wouldn't assume any pull-up on the line is strong enough to use it in an open drain configuration.

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