2 replies to this topic

[sebastianpatten]

Hi there - I have two power sources that I use. One is the 3.3/5v that comes with the netduino and the other I use is a 9v breadboard. So if I were to put an output from the 9v breadboard into an input port on my Netduino - can i just put a straight 9v in? Or do i need to voltage divide it down to 5v? Is there any amp restriction? Thanks!

[phantomtypist]

I think the digital pins are 3.3v, but 5v tolerant (meaning maximum of 5v.) If using the analog feature on the digital pins, then you can only have a maximum of 3.3v input. If there is no way for your to input within those parameters then you will have to build a logic level converter that converts your 9v to 3.3v or 5v (depending on whether you are using digital or analog.)

[sebastianpatten]

So in theory using a voltage divider circuit I could achieve 5v using an 800 ohm and 1k ohm resistor. What would the amps be on this? And would the amps damage the netduino?