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Thanks! FYI, this project is to connect the sender paddlewheel from a 'Signet Marine' SMARTpak SL80, to a Raymarine ST40 Bidata display.
OT: If I'm not mistaken, I believe the 25 foot westerly is similar to the Sabre 28. Kitchen is in a different spot, but both are nice cruising boats that...
Thanks, Eric. Yes, the boat is a 1975 Sabre 28 -- length at waterline is just under 23 feet, so theoretical hull speed is, of course, actually under 8 knots.
The schematic makes sense -- two questions:
* What does the notation: "wiper = 0.25" mean? Some 'base' resistance in the variable...
Thanks for the reply - the speed sensor's output is speed-dependent. If I read the specs correctly, for the range of interest, the output voltage will be between 0-8 volts peak-to-peak (and will vary with frequency from 0-48Hz).
That is, the frequency is 6Hz/knot and the voltage output is 1V...
Hello -- I have sailboat with an (existing) speed-sensing ‘paddlewheel’ sensor that I am trying to use with a new data display. I have gotten lucky because the sensor and the data display both have the same frequency per knot (~6Hz/knot) – however the existing sensor generates an AC signal...
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