Has anyone added a pull up resistor to get their SDS fuel flow output to work with a Garmin GEA24? I've reached out to Garmin to help size it, and after 3 emails they're still asking me who makes my fuel flow transducer. Garmin did confirm they're looking for square wave falling edges on the pulses, and SDS has said they pull that pin to ground for a pulse, but suggested it may need a pull up resistor to get the voltage high enough for Garmin to see the falling edge. I think this is the right answer, but I'm not good at circuit design.
Can any electrical guys chime in on proper resistance and power rating for this application? Thanks!
Can any electrical guys chime in on proper resistance and power rating for this application? Thanks!
Last edited: