Looking for a 5V valve to be driven by ARDUINO
I am working on a project to make an automatic watering system driven by arduino. I am looking for a valve which I could operate without any extra power supply but the 5V from the ARDUINO.
It would be perfect if the valve could be in the range of the 6mm for tubes connections.
As my project will rely on gravity for water movements, I don't want to use a pump or whatever active device. Just some standard batteries connected to ARDUINO.
Do some of you know such a valve?
I have looked on the net without any success. I have found loads of watering projects using arduino but none with the same phylosphy. If you know one, please let me know.