I think I fried the 5v output pin. I can measure 3v on the 3v pin and 5v on VUSB on the back, but nothing on the 5v pin. Any way to potentially fix? I think I can still do what I want with using the 3v pin, but figured I would ask.
Thanks,
Idiot with fat fingers I guess…
That sounds like something is not correct but without knowing what you have I cannot really determine anything. If you violated the following rules you probably have a crispy critter.
Gil's Crispy Critter Rules applies to RPs as well:
Rule #1. A Power Supply the Arduino is NOT!
Rule #2. Never Connect Anything Inductive to an Arduino!
Rule #3 when first starting out, add a 220R resistor in series with both Input and Output pins. (LarryD)
Rule #4 buy a DMM to measure voltages, currents and resistance. (LarryD)
Violating these rules tends to make crispy critters out of Arduinos.
I think I accidentally touched some pins together that shouldn’t have with my fat fingers…. Lesson learned.
Did it ever work? That is get 5V from this pin.
The schematic of the Nano RP2040 shows no 5V output. What is shown in that place is the Vusb connected through a link SJ1. Is this link actually made? On my board it is not made by default.
Just had a look at a schematic diagram from Adafruit.
The pin next to A0, called Vhi, is a diode drop below the USB and/or battery supply.
Maybe one of the diodes has failed (D2).
But that doesn't explain that 3.3volt is still there.
Maybe OP means that D5 (5volt logic output) is not working.
Leo..
That is not the schematic of a Nano RP2040 connect.
This is the schematic for the official Arduino product.
Top right hand corner shows output pins and the link, which is not made on my original board, where as the 3V3 link is made and needs curring to unmake it.
Almost the same story.
Vin, next to the GND pin of P2, is a diode drop (D2) lower than USB.
But if that's missing, there won't be a 3.3volt rail either.
Not sure what's going on.
Leo..
Don't know what you are talking about here.
This is an enlargement of the pin out section, what pin are you talking about? I don't see any diode here.
Vin is only used to power the 3V3 regulator. The diode between VUSB and the step down regulator provides power only for the 3V3 regulator in the absence of a Vin power. This has no effect on the VUSB signal that can be connected to pin 12 of JP2 if that link is made.
Bottom/left. D2 is between Vusb and the 3.3volt step down converter.
But there is also a Vin-rail symbol.
That Vin rail must have ~4.6volt present when on USB power.
Leo..
Yes of course. But I still don't understand what you are going on about. The OP said:-
This is nothing to do with the Vin pin, he doesn't mention it. And all that is actually doing is driving the 3V3 regulator, which ~4.6V is more than enough.
What I am saying is has the link to the 5V output been made.
This is my nano connect
and you can see the dotted line round that link is not made by default, where as the 3V3 link you can clearly see needs cutting to unmake it.
I am asking the OP if he has actually made that link.
I am not sure what you are trying to get at with your comments.
I was reading the schematic and documentation while trying to fall asleep last night and yes realize I am an idiot. I jumped the SJ1 jumper this morning and it is all good.
Thanks.
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