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    VPP655 PWM Input: direct 3.3v interface possible?

    Thank you for getting back to me. I have read the recommended specifications for PWM fans as documented by Intel (here) and note, on page 9, they state (emphasis mine): However, I have noticed some old PWM fans pull up to 5v. Therefore, I will assume your pumps conform to the Intel fan...
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    VPP655 PWM Input: direct 3.3v interface possible?

    Hi Folks, I'm hoping to control a VPP655 with a 25kHz PWM signal generated from a 3.3v microcontroller (which is not 5v tolerant), so I would like to know if the pump uses an internal pull-up resistor to 5v before I release any magic smoke. :) If it doesn't utilise a pull-up, would it accept a...
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