Should I use a specific type of wire with the switch through 15m ^^

 

Should I use a specific type of wire with the switch through 15m ^^

Any 2-conductor cable such as 18AWG lamp cord will do.

 

I generally use a schmitt trigger input for these potentially noisy inputs, the 16f877 has a few to pick from, marked ST type.
Max.

 

Any 2-conductor cable such as 18AWG lamp cord will do.

Thanks a lot

I generally use a schmitt trigger input for these potentially noisy inputs, the 16f877 has a few to pick from, marked ST type.
Max.

You mean without using opto isolator ?

I used st pins for other purposes

 

It is up to you if you use ST in, it is less of a necessity if using a Opto in maybe, but any potentially noisy input I try and use ST if available.
Are you not intending to protect the cable on a 15m run. Even SO-18/2 or SO-18/3?
You could even use a 3wire and bond/GND the tank, if metallic.
Max.

 

[QUOTE="
Are you not intending to protect the cable on a 15m run. Even SO-18/2 or SO-18/3?
You could even use a 3wire and bond/GND the tank, if metallic.

This point not clear for me

[/QUOTE]

 

What else is involved with this system apart from the level sensor, I assume the micro is controlling something as a result?
SO cable is rubber sheathed flexible cable, is the 15m run exposed to any elements or in danger of damage?
Max.

 

What else is involved with this system apart from the level sensor, I assume the micro is controlling something as a result?

Yes..


SO cable is rubber sheathed flexible cable, is the 15m run exposed to any elements or in danger of damage?

May I use cable like this


.

 

You could, but I would not myself, depending on the conditions it is installed under.
My questions were to try and ascertain the environment it is installed in, and what is it controlling, IOW, knowledge of the Application helps..
I just get a terse 'Yes'.
Max.


,

 

The level switch will stop the water pump once the water reach the full level ^^

I will insert the cable inside a plastic tube like the following

 

Looks good. The switch should go on the GND leg for safety.

whose or what safety?

 

Any particular reason you are using plastic tube?
Although there is PVC conduit and fittings.
In an industrial, or even semi industrial environment I generally use flexible metallic conduit.
Max.

 

Any particular reason you are using plastic tube?

The tank placed on the roof of the building .
10m of the cable placed outside my flat and the other 5m inside.
So I am thinking to use plastic tube to protect the cable from rain ,sun ...

Although there is PVC conduit and fittings.
In an industrial, or even semi industrial environment I generally use flexible metallic conduit.
Max.

 

Preferaly the pipe you show is plastic conduit and fittings?
Where is the pump situated?
Max.

 

Preferaly the pipe you show is plastic conduit and fittings?

Yes

Where is the pump situated?

In the parking close to lower tank

Max.

 

I would assume there is a lot more to it than a level switch and a pump, in order to require a 40 pin Micro?
Max.

 

I would assume there is a lot more to it than a level switch and a pump, in order to require a 40 pin Micro?
Max.

Yes,
It includes lcd,push buttons to set the on time of the pump , relay and leds.