Re: Lawn sprinkler alarm
- --- In Electronics_101@yahoogroups.com, Jong Kung <jongkung01@...> wrote:
>Or you could use the mouse to detect lines (tape) marked on the hose which would also tell you if it had "come off the rails"
> Optical mouse technology seems kind of high tech. I don't think optical mouse works for uneven (grass) surface. The magnet + hall sensor technology is proven in car abs system. And they work even with dirt, etc..
- I have settled on a hall sensor and magnets on the front wheel after determining how to mount and keep water tight.
Thanks all for the insight.
--- In Electronics_101@yahoogroups.com, "normnet2003" <normnet2@...> wrote:
> I have been using a self moving lawn sprinkler however when it pulls 50' of water filled hose it can easily loose traction if it's wheels are on a root, cement, stone or even bare un-rooted ground.
> I have built the notification part of the alarm by use of a walkie talkie and now need a way to detect the loss of forward movement.
> I am trying a MMA7361 accelerometer but I don't think it can reliably detect movement due to it's slow pace.
> What type of sensor would detect roughly a 1 foot movement over a 2-3 minute period?
> Is their a dead reckoning type of sensor?