I know that the subject was already discussed but my English is not very good and I lost myself a little in all this discussion.
A member on this forum had posted this bond Internet http://www.cromwell-intl.com/radio/probes.html to build probes 10x. I did not build myself these probes but I had the idea to connect in series 2 resistors of 3.3M and 2.2M (for a total of 5.5M) to each one as of the my probes (white and black). I have to connect to input of my resistor a cable directly connected to my faceplate of 120V AC, and I connected my probes (white and black) to the exit of my resistors to input of Nano. Here what I obtained(see attachment).
Is what all that is correct? Is what I can better do? Is what I can also connect this assembly on 220V AC?
If I understood well, when I am connected on the 120V, one should not be connected at the same time on the USB port!
When I touch the aluminum case of Nano, there is a light rise in the voltage. Why?
When I bought my Nano, I believed that I was limited to connect 40V maximum. I am quite happy of my purchase when I note now that I can connect until 400V according to information given by BenF here download/file.php?id=457
Glad to know you can build a probe by yourself to use with NANO.
But I still need to remind you, we suggest Max input voltage is 80Vpp.
And you should view the schematic to know when we detect the voltage there is some resistance in different channel.
So might be if you turn the wrong one could be burn!.
Here is the schematic.
It is not about resistance or probe. It just you can use it to over then 80 Vpp.
So if you build a probe by yourself, still can work correctly below 80Vpp.
