1- Sounds like you skipped Reply#6. ( too bad)
2- Based on replies in your post , you never posted any schematics or asked for ang clarification on your circuit. You never told us how much electronics dxperience you have and hou never ssjed us to verify that what you planned to do was the correct course of action
Reply # 11
relay)
However, I'm still trying to see how it works exactly and if I can use it for the arduino. If someone knows or has any ideas, they are most welcome.
Two things: you will likely need a free-wheel diode across your pump to prevent arcing of the
relay contacts.Also that temperature sender is likely to be thermistor, you'll need to find the response curve of
resistance v temperature to convert its resistance to temperature, and use a resistive divider to
actually measure its resistance.
So I have connect the temperature sensor and everything was working good until my laptop turned off instantly while i was using the arduino connected to the USB. Now I cant turn it on
I really dont undestand why, the laptop has only 3 months!!
Where is the post where you post a schematic of your planned interface and ask us to check your proposed circuit ?
As far as I can see, at NO time did you ever post a schematic saying :
"This is what I plan to do and this is my circuit. IS this correct ?"
( you also IGNORED the question in Reply#6 about your experience.
If you needed to post to ask us then you probably needed to ask us to check your proposed circuit.
That apparently never happened, and this is the result.
We have no idea what you did because you never posted your circuit wiring before you actually hooked it up. We have no idea how you wired anything. We know you have a relay and a sensor and that's all we know. (well, actually , now we know whatever you did without asking us first didn't work)