Here I expose my own concerns: I'm working on an interactive installatio and I find myself having to interface an ultrasonic sensor, SRF04 Daventech model with Arduino One.
From the technical manual that I downloaded from http://www.robot-electronics.co.uk/htm/srf04tech.htm
seems that this sensor has an average current consumption that is around 30mA. I know that Arduino can provide a maximum current equal to 20mA.
My fear is that, by linking the two systems, they can be damaged.
Am I worrying for nothing? if not, how can I do to connect the two systems without risk of damage?
Thank you in advance