Quote:
Originally posted by nuclear
ok marco i updated my design to take the error i made in account
Top relay is relay 1 and bottom relay is relay 2.
relay 1 is always open (current doesn't flow) until water level goes over the lines.
relay 2 is always open (current doesn't flow) until water level goes under the lines.
The switch is used to control the current for the pump.
I think it would be called a relay but i'm not sure.
There would be 2 sides of it and the latch inside would move depending on the magnetic field which relay 1 or 2 will generate.
It functions is this: when current flow trought relay 1, it moves the latch away from the connectors so cut the current to the pump. When current flow trought relay 2 it moves the latch to the connectors and will enable current to flow trought the pump.
Now the trick to this is the latch need to move only when a relay is closed and doesn't move when the relay opens. Much like a wall switch but activated by the relay.
I will try to find relay that does it.
the drawing is not perfect. i will try to do an exact drawing when i find the exact relay to do the function of the switch
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Thankx nuclear. The switch you are talking about sounds like a kind of reed relay.
I think I can understand what you are driving at. But how do you make the "switch" only respond to a relay closing?
I'm thinking that in any case this device would require some kind of memory, so it can "know" if it is currently in use and water is draining, or if it is currently refilling. From there it would be fairly straight forward I think. Can anyone suggest how I can do this with as few components as possible?