Speed Sensor Anyone???

[Ramius]

Thanks Walter!
It is actually for my submarines.

Best, Ed

[pedja089]

You still can use differential sensor. Only math is different...

[Ramius]

Thanks Pedja089!
Aside from the program part, it would be nice to see what the actual differential sensor looks like. It is going into a model submarine and I would like to avoid such devices such as the "pitot" tube used by Eagletree as this would make the sub look very strange with a rod sticking out the front!

Best, Ed

[pedja089]

You can make just small hole in front, and back of sub... Or on front and back side of "fins" or what ever it's named...
So when submarine go forward pressure on front sensor is larger than on back sensor, and faster it goes, difference is larger...
My suggestion is that you buy some analog sensor, and try it on peace board that you push through water and see what is happening...
Also you can use small propeller and count impulses...