Mod Edit, I split this because it's way off topic from the topic it came from.
DO NOT connect 5V to the 5V pin, it is an OUTPUT, NOT an INPUT.
Once you change Vin to 9V your 5V supply will now need to come from the nano every
Wrong. If the barrel jack is not used, the 5v is fed IN on the +5V line.
2 Likes
Jim, sorry you are mistaken, it is perfectly OK, and I suggest preferable, to provide power to the 5V pin at 5V.
2 Likes
The documentation says:
5V: This pin OUTPUTS 5V from the board when powered from the USB connector or from the VIN pin of the board.
The pin-out diagram has a little arrow pointing AWAY from the board, indicating it's an OUTPUT.
I think the manufacturer of the board has made it quite clear that it is an OUTPUT.
What makes you believe it's an INPUT?
The documentation says:
5V: This pin OUTPUTS 5V from the board when powered from the USB connector or from the VIN pin of the board.
The pin-out diagram has a little arrow pointing AWAY from the board, indicating it's an OUTPUT.
I think the manufacturer of the board has made it quite clear that it is an OUTPUT.
What makes you believe it's an INPUT?
Notice it says its only an output if Vin or the USB is used.
5v is a tie point on the +5V buss, it does not care WHERE the +5 is derived. You can generate the +5 using the onboard 7805 from the barrel jack, from the 5V from the USB, or from an external +5 power supply. As an output, you can only draw enough current for an LED or two. In all cases the card should only be connected to a single power source at a time.
The onboard voltage regulator is a linear part and must dissipate the voltage differential times the current in heat. Since it is a physically small part, it cannot dissipate much beyond what the card itself needs before going into thermal shutdown.
I use external +5 power supplies, fed in on the +5V pin with no connection to the barrel or USB. This allows me to power everything from a separate power supply without overheating or current limit issues.
Power Distribution Board piggybacks on Mega Terminal Shield
Project fed entirely with external +5V power. Mega powered via +5V pin
If you are powering from a source other than the USB, you should insure there is no chance of back feed into the PC power by installing a SPST switch in the RED USB wire like this:
What 7805 ?
I think you are looking at a completely different arduino or a completely different topic/post.
I didn't see a mention of cpu type. Arduino uno & mega have 7805 type analog regulators. If you're not plugged to the barrel jack the you HAVE to feed in power from the +5 or usb. How do you think projects NOT connected via USB and WITHOUT an onboard Vreg are powered?
Try reading the entire post like I did
Does not change the fact that the best way to power the cpu and devices is from a separate 5V power supply on the +5V pin.
Don't believe me, but I've got dozens of high current projects running for years from power fed in on the +5V pin alone.
Have you even TRIED it our way?
If there is no onboard Vreg then why did you state Vin must be
You also suggested:
So your idea must be wrong since the is NO Vin pin if there is no onboard Vreg. Seems you didn't "Try reading the entire post like I did"
What does not change the fact?
Whether I read every word like you DIDN'T.
Well, I guess it's up to the OP to decide who is right, the manufacturer of the Arduino Nano Every or you.
There is no Vin pin on the every. Where do YOU power it from?
Actually there is Vin on every: https://content.arduino.cc/assets/Pinout-NANOevery_latest.pdf
I might be not following, will have to re-read all the comments tho
1 Like
What about the one marked Vin. I would think that would be Vin. What else could it be?
No, you are following OK.
Then there IS an onboard LINEAR voltage regulator on the nano (contraryto your assertion otherwise), its just an LM1117 instead of a 7805, but the SAME ISSUE APPLIES. The +5 pin is only an output IF Vin or USB is used, OTHERWISE it is an +5V INPUT
WHERE do you see a linear regulator?
